I am looking to put a light bar on my Blazer and taking off the brush guard. I have the fog light relay already installed on the car from the factory. I am looking to see if anyone has a picture of where the stock from bumper harness looks like on the ones that have fog lights stock. Wiring diagrams and google are not getting me anywhere. I am stumped.....

 

If you are trying to use the stock fog light switch and relay on a truck that didn't come with that option from the factory, it won't work unless you reflash the BCM.

 

would it be possible to wire the factory fog light switch to a relay and then the aftermarket lights without programming the bcm? . I have the switch from a doner and my truck did not come factory with fogs....I currently have just a toggle that works but the factory switch would be cool.

 

Well, here's a diagram of someone using a PAC module to do it:

https://blazerforum.com/forum/lighti...-sticky-85674/

Not a whole lot of documentation though. Kind of leaves you hanging wondering what the end result was. For all I know , it either worked well , or caught his truck on fire.

 

well I guess I will gather up a relay and maybe my buddy still has his VIN from his 2000 blazer with factory fogs ....I do have a Tech II so programing shouldn't be to tough....feature 3 with the PAC7 would be sweet though.

 

HOW TO BYPASSING BCM ON 2001 CHEVY S10
FOR FACTORY FOG LIGHTS & IT'S EZ!
CONNECT TO MOMENTARY PUSH BUTTON N/C
TO (BLUE WIRE) PIN #30 & THE OTHER SIDE OF
SWITCH TO GROUND(THE SWITCH USED TO TURN OFF LIGHTS)
CONNECT TO (WHITE WIRE) PIN #85 12VOLT +
THRU A FUSE & SWITCH 12V THRU IGNITION
SO THE FOG LIGHTS TURN OFF
CONNECT TO PIN #86 (BLACK WIRE) TO PIN #87
(YELLOW WIRE) TOGETHER


& TO THE ORANGE WIRE
ON BACK OF FOG LIGHT SWITCH & CUT &
ORANGE WIRE TAPE END OF WIRE IN TO
HARNESS & RUN A WIRE TO DARK GREEN/
WHITE WIRE & CUT & TAPE DARK GREEN/
WHITE WIRE into HARNESS
THE RELAY IS A STANDARD FOG LIGHT RELAY
THIS IS A LATCHING RELAY SETUP GM WANTS
$300 TO UPDATE THE BCM! I DON'T THINK SO!!!
KIDD