Now what's so hard about making a video like this . This guy in a 2 min video answered all my questions. I have been searching for a few hours now and he nailed it on the head. I bought a a gm ls high output alt from a guy who project went bust so I got a brand new js alts 370 for 300 but on my other vehicle it was plug and play no harness that's a v6 3.5 chevy malibu. This time it had this harness I didn't want to fuck up a 500 dollar alternator before I got use it thanks for ur help and info awesome BTW this 1 didn't have the manufacturer instructions in the box
I have a two wire harness on an 86 elcamino but put a serpentine setup on it which took a four prong plug, got the plug but which wire goes to what and or what to do with the leftover wires
Match up letter codes on back of each alternators voltage regulator. LFS. Any unused wires get tucked away. Website has instructions as well. Autotechengineeringusa.com
S to Battery + Post , L to Dash Light what about Field? I am thinking of putting it to 12v switched ignition but im not sure if L takes care of it or is necesary to have them both conected
I made it. 12V from ignition source - bypass fuse to ignition fuse and you have a second 12V. Add resistor 470Ohm and connect it to L terminal. It works in my Cadillac STS Seville 2000.
@@patrykreksa1564 thanks. My vehicle originally just has the one wire to dash light. (Position L) So all i have to do is wire in a 470ohm resistor to make it charge? Or do i need to also hook up the S wire to charge post?
Nice explanation I need help I bought use1999 Toyota Avalon from someone the alternator wire socket pin from the car is 3 red colour with blue on it, yellow colour and white. When I look at the alternator pin I notice it comes with 4 pins and the socket. The car 3 wire connected to socket pin one was ignore base on the car factory alternator pin wire w 3 alternator charge on it comes with 3 pin ,. Now I want to fix recommended alternator for the car has 3 pin and the socket, my problem how will I identify and connect on the new alternator socket 3 new pin socket I bought for this new alternator thanks
I have a cs130 CVF alternator, but the pig tail that plug in to alternator is missing, do you sell em? Trying to figure out what plug I need it's a 3 prong, 3 pin plug. This plug the same one
What about serpentine belt replacement? I have a 2000 chevy silverado 1500 with ac. Do I need a bigger belt or smaller belt? Where can I find the right size if I have the 320alt.
I have a DC 170A alternator that I installed on my 02 Silverado w/ 5.3. Stock was a 105A alternator so it has a 3 pin connection on it. The DC has a 4 pin conection and us making a Whirring sound now when I drive but that's the only issue I'm having with it. Do I need to change the harness to a 4 pin if so how would I do this. Please advise any help from anyone would be appreciated and thanks for a awesome tutorial JS 👍
I'm getting a "SERVICE BRAKE BOOSTER" because your new harness doesn't use a "P" terminal. Do you know what I connect to my Factory's "P" Terminal? I have a 2003 Yukon.
I have a 2003 Avalanche 1500 and just went through this. If you are getting "SBB" like i was, the P goes to the (SBA) supplemental brake assist pump. should be the blue wire on your pigtail. The 250 amp alternator from JS only had 2 hairpins in a 4 pin plug F & L, The stock alternator is a 3 hairpin 4 pin plug F, L, & P. S is not used on the factory harness.
@@lsgangjohn9896 yes. I took it to a local shop and he soldered a wire to a source inside the alt to get the voltage required. I used a butt term to the blue P wire been perfect since I installed it.
Possible unless you ordered their 15.5v internal voltage regulator. If you didn't then it could be wired wrong or its a low quality regulator that is spiking. Hard to tell.
So i upgraded my cs130 to a cs130d. Kept the L wire to idiot light in dash. From what I understand by you ad this is the plug i have now.. i need to run a wire from “s” to keyed 12v , so its not constant, ..what about the use of a 470ohm ressiter in line on the s terminal? My idiot light in dash is a LED
And the L goes straight to dash light and the opposite side of it is my ignition 39 wire . So the diode will in theory drop the voltage so it wont overcharge correct? And that is between the s terminal & main battery lug on back of alternator correct?
@@autotechengineeringusa to run a 160 amp alternator off a 2005 Silverado “ 2 pin style “ connector i currently have the 145amp alternator 4 pin alternator
@@autotechengineeringusa my truck harness has 3 wires -engine on signal -Charge indicator control -generator field duty cycle signal The 05 Silverado has 2 wire the square connector -generator field duty cycle signal -charge indicator signal Is there any way to just change out my connector and make the 05 amp charge correctly not stay in limo mode at 13.5v
@@christopherhernandez9115 the 2 pin regulator is pcm controlled so you would need to change that. Msg us at info@autotechengineeringusa.com for more detailed help
@@autotechengineeringusa so that means if I use factory harness it won't charge higher than what the pcm says? And that's the reason for the bypass? Thank you for responding so quickly js is the only company that makes a h/o alternator that I can afford just trying to do my research and see what I'm getting into
Great video JS alternators didn’t send out and wiring instructions with mine
They also don't post videos because they buy their units from china
Now what's so hard about making a video like this . This guy in a 2 min video answered all my questions. I have been searching for a few hours now and he nailed it on the head. I bought a a gm ls high output alt from a guy who project went bust so I got a brand new js alts 370 for 300 but on my other vehicle it was plug and play no harness that's a v6 3.5 chevy malibu. This time it had this harness I didn't want to fuck up a 500 dollar alternator before I got use it thanks for ur help and info awesome BTW this 1 didn't have the manufacturer instructions in the box
Thank you so much for this video..straight forward and right to it!!
The most helpful info thnx my honda has the 2 wires only yellow and blue
I have a two wire harness on an 86 elcamino but put a serpentine setup on it which took a four prong plug, got the plug but which wire goes to what and or what to do with the leftover wires
Match up letter codes on back of each alternators voltage regulator. LFS. Any unused wires get tucked away. Website has instructions as well. Autotechengineeringusa.com
Helpful video Autotech FTW
Will this be for a 1988 Olds 98 regency brougham my stock plug is a 2 pin
The light will come on in a corolla 2021?
If bypassed yes
Is it possible to bypass a 24v to stabilize charging system.
Is this for harness for a 2004 Chevy Tahoe?
I just have a alternator with the LPS code . Do I need to buy a new harness or use my stock GM ?
S to Battery + Post , L to Dash Light what about Field? I am thinking of putting it to 12v switched ignition but im not sure if L takes care of it or is necesary to have them both conected
Do you have any information about that? Can we do that?
Did you ever
Figure this out ? Same question
I made it. 12V from ignition source - bypass fuse to ignition fuse and you have a second 12V. Add resistor 470Ohm and connect it to L terminal. It works in my Cadillac STS Seville 2000.
@@patrykreksa1564 thanks. My vehicle originally just has the one wire to dash light. (Position L) So all i have to do is wire in a 470ohm resistor to make it charge? Or do i need to also hook up the S wire to charge post?
@@jus10inla without S terminal will be ok.
Nice explanation I need help I bought use1999 Toyota Avalon from someone the alternator wire socket pin from the car is 3 red colour with blue on it, yellow colour and white. When I look at the alternator pin I notice it comes with 4 pins and the socket. The car 3 wire connected to socket pin one was ignore base on the car factory alternator pin wire w 3 alternator charge on it comes with 3 pin ,. Now I want to fix recommended alternator for the car has 3 pin and the socket, my problem how will I identify and connect on the new alternator socket 3 new pin socket I bought for this new alternator thanks
I have a cs130 CVF alternator, but the pig tail that plug in to alternator is missing, do you sell em? Trying to figure out what plug I need it's a 3 prong, 3 pin plug.
This plug the same one
Send us a picture of the alternator plug end. Email, info@autotechengineeringusa.com
What about serpentine belt replacement? I have a 2000 chevy silverado 1500 with ac. Do I need a bigger belt or smaller belt? Where can I find the right size if I have the 320alt.
a half inch shorter belt is usually required. any auto parts store will have
I have a mechman 370 elite alt. For a gm they don't make this for a ford I have a 3g stocker and wondering how I wire this up
Wire what up? The nechman?
@@autotechengineeringusa no it's simple I'm trying to reconnect my 3g with it but it keeps charging raising voltage and not stopping
How do you get the battery light off the dash
Wondering too
I have a DC 170A alternator that I installed on my 02 Silverado w/ 5.3. Stock was a 105A alternator so it has a 3 pin connection on it. The DC has a 4 pin conection and us making a Whirring sound now when I drive but that's the only issue I'm having with it. Do I need to change the harness to a 4 pin if so how would I do this. Please advise any help from anyone would be appreciated and thanks for a awesome tutorial JS 👍
It depends on the alternator style
Hey Sam voy a vender mi alternador es de allí contigo lo tengo en 1997 Corolla a cuáles carros les puede quedar? Gracias es un 270 amp
I'm getting a "SERVICE BRAKE BOOSTER" because your new harness doesn't use a "P" terminal. Do you know what I connect to my Factory's "P" Terminal? I have a 2003 Yukon.
P is rarely used. If you are not seeing 14.8+ off the alternator post then you may have wired incorrectly
I have a 2003 Avalanche 1500 and just went through this. If you are getting "SBB" like i was, the P goes to the (SBA) supplemental brake assist pump. should be the blue wire on your pigtail. The 250 amp alternator from JS only had 2 hairpins in a 4 pin plug F & L, The stock alternator is a 3 hairpin 4 pin plug F, L, & P. S is not used on the factory harness.
Im hoping i can just change the voltage regulator to a 4 hairpin so i can use factory harness
@@dadokta u ever figure it out?
@@lsgangjohn9896 yes. I took it to a local shop and he soldered a wire to a source inside the alt to get the voltage required. I used a butt term to the blue P wire been perfect since I installed it.
Make more videos like that one. And tell wich one light go to.
Is the factory harness bypass required or can i use your alternator without it and use the stock harness to retain factory functions?
Depends on vehicle year plus our harness helps to turn off dash light
@@autotechengineeringusa it's for a 2004 Chevy Tahoe 5.3L
@@autotechengineeringusa Do i need to splice my factory harness or is your adapter harness plug and play?
@@autotechengineeringusa It's for a 2004 Chevy Tahoe.
@@autotechengineeringusa Will the 2 wire harness also turn off battery light?
My js alternator is charging at 15.5 why would it be doing that can i have it hooked up wrong.
Possible unless you ordered their 15.5v internal voltage regulator. If you didn't then it could be wired wrong or its a low quality regulator that is spiking. Hard to tell.
@@autotechengineeringusa my small blue box spikes from like 14. 8 to like 16.7
@@bassheadlife492 may be belt slip or a failing box
@@autotechengineeringusa definitely not belt slip, the reg was brand new but it's doing its job so I've just been running it
So i upgraded my cs130 to a cs130d. Kept the L wire to idiot light in dash. From what I understand by you ad this is the plug i have now.. i need to run a wire from “s” to keyed 12v , so its not constant, ..what about the use of a 470ohm ressiter in line on the s terminal?
My idiot light in dash is a LED
The truck is a 93 k1500.. had the square plug, new alternator has oval
L is ignition S is sense and goes to alternator positive post
Resistors are sometimes ised on L, but it's not needed if you are on a switched fuse. Diodes are used on sense
@@autotechengineeringusa thanks. What size diode ? The 1n4001?
And the L goes straight to dash light and the opposite side of it is my ignition 39 wire . So the diode will in theory drop the voltage so it wont overcharge correct? And that is between the s terminal & main battery lug on back of alternator correct?
On a 03 Silverado 3 pin connector how can I get a 2 in connector to work and actually get the alternator to charge ?
Oem is 3 pin. Why would you want a 2 pin
@@autotechengineeringusa to run a 160 amp alternator off a 2005 Silverado “ 2 pin style “ connector i currently have the 145amp alternator 4 pin alternator
@@christopherhernandez9115 get a voltage controller
@@autotechengineeringusa my truck harness has 3 wires
-engine on signal
-Charge indicator control
-generator field duty cycle signal
The 05 Silverado has 2 wire the square connector
-generator field duty cycle signal
-charge indicator signal
Is there any way to just change out my connector and make the 05 amp charge correctly not stay in limo mode at 13.5v
@@christopherhernandez9115 the 2 pin regulator is pcm controlled so you would need to change that. Msg us at info@autotechengineeringusa.com for more detailed help
I have a 2008 Impala LS 3.5l flex fuel will I be able to use my factory connector?
You can but your voltage is pcm controlled. We recommend our voltage bypass option.
@@autotechengineeringusa so that means if I use factory harness it won't charge higher than what the pcm says? And that's the reason for the bypass? Thank you for responding so quickly js is the only company that makes a h/o alternator that I can afford just trying to do my research and see what I'm getting into
@@aaronlawrence4218 our 240amp is 325.00 and 320amp is 360.00. Also, js does not provide any video proof of output
@@autotechengineeringusa I want to push like 1500w should I get the 240 or do I need the 320
@@aaronlawrence4218 240amp
Hi sir.how about c on alternator pls csl plug
What vehicle?
@@autotechengineeringusa
I put a nissan tida alternator 140a in to my nissan pulser. Just connect s to s and L to L it is ok to leave C by itself
I need help
Info@autotechengineeringusa.com
I need help installing mine 2003 tahoe
Give us a call for any immediate assistance
Sir generators problem gmc
All that talking and he didn’t tell us which wire went where