Foglights On With High Beams

[jonboy77]

I'm to new to the forum to get in on that deal. Thanks brother. If I can ever help. Let me know.

[wurgs]

I'm to new to the forum to get in on that deal. Thanks brother. If I can ever help. Let me know.

I still have some around I think. PM me your name and address and will send them out.

[jonboy77]

WURGS sent me a few. I am going to do this today. High w/fogs.

Edited August 31, 2015 by jonboy77

[jonboy77]

 

2014 SIERRA SLT FOG LIGHTS WITH HIGH BEAM HEADLIGHTS MODIFICATION

• This mod will let you use the fog lights on low beam same as factory. On and off with the fog light button.
• When the fog lights are turned on while on low beam, then the high beams are either flashed or turned on and then off, the fog lights remain on when going back to low beam.
• When the high beams headlights are switched on, the fog lights come on also. You cannot shut the fog lights off with the high beams on. When going back to low beam, the fog lights go off if they were off prior to switching high beams on.

 

• Find the BCM under the dash, just to the left side of the steering column, right behind and above the OBD2 connector. It's a black box about 7" square and an inch thick. It will have 7 connectors in the lower edge of various colors.
• Pull the BROWN connector loose. There is a little tab you need to squeeze inward to release it.
• Look at it closely, there are tiny numbers at the corners to give you pin location reference. Use my attached connector photo and the numbers on the connector, along with the colors of the wires to locate the proper wires.
• Locate pin #10 with the Brown and White striped wire. This is the Fog light signal wire for the relay.
• Locate pin #18 with the Brown and Violet striped wire. This is the High Beam signal wire for its relay.
• Take a 1N4004 diode and push the wire lead of the diode in along side the wires with a pair of needle nose pliers. You need to push hard to get it to slide in about 1/4" so it will stay snug. Make sure the marked end of the diode (stripe) is toward the High Beam.
• You can put a piece of electrical tape over the bare diode leads or you can slip a piece of heat shrink over the diode before you install it and shrink it after pushing it in. But there's really no need as these are switched Ground leads, not power.
• Put the BROWN connector back in the BCM.
• YOU'RE DONE. THAT'S IT.

The BCM is behind this area

 

 

This is the BCM.

 

 

In this picture, my arrows point to the rows to intersect the proper wires.

 

 

 

The diagram below shows the connector oriented as you see it in the photo above so you can locate the correct pins.

 

 

Rectifier Diodes are available at any electronics store or Radio Shack.

http://www.radioshack.com/product/index.jsp?productId=2036270&znt_campaign=Category_CMS&znt_source=CAT&znt_medium=RSCOM&znt_content=CT2032230

 

2014 SIERRA SLT FOG LIGHTS WITH HIGH BEAM HEADLIGHTS MODIFICATION

• This mod will let you use the fog lights on low beam same as factory. On and off with the fog light button.
• When the fog lights are turned on while on low beam, then the high beams are either flashed or turned on and then off, the fog lights remain on when going back to low beam.
• When the high beams headlights are switched on, the fog lights come on also. You cannot shut the fog lights off with the high beams on. When going back to low beam, the fog lights go off if they were off prior to switching high beams on.

 

• Find the BCM under the dash, just to the left side of the steering column, right behind and above the OBD2 connector. It's a black box about 7" square and an inch thick. It will have 7 connectors in the lower edge of various colors.
• Pull the BROWN connector loose. There is a little tab you need to squeeze inward to release it.
• Look at it closely, there are tiny numbers at the corners to give you pin location reference. Use my attached connector photo and the numbers on the connector, along with the colors of the wires to locate the proper wires.
• Locate pin #10 with the Brown and White striped wire. This is the Fog light signal wire for the relay.
• Locate pin #18 with the Brown and Violet striped wire. This is the High Beam signal wire for its relay.
• Take a 1N4004 diode and push the wire lead of the diode in along side the wires with a pair of needle nose pliers. You need to push hard to get it to slide in about 1/4" so it will stay snug. Make sure the marked end of the diode (stripe) is toward the High Beam.
• You can put a piece of electrical tape over the bare diode leads or you can slip a piece of heat shrink over the diode before you install it and shrink it after pushing it in. But there's really no need as these are switched Ground leads, not power.
• Put the BROWN connector back in the BCM.
• YOU'RE DONE. THAT'S IT.

The BCM is behind this area

 

 

This is the BCM.

 

 

In this picture, my arrows point to the rows to intersect the proper wires.

 

 

 

The diagram below shows the connector oriented as you see it in the photo above so you can locate the correct pins.

 

 

Rectifier Diodes are available at any electronics store or Radio Shack.

http://www.radioshack.com/product/index.jsp?productId=2036270&znt_campaign=Category_CMS&znt_source=CAT&znt_medium=RSCOM&znt_content=CT2032230

This has not been covered from what I can find but I have a 2015 GMC 1500 SLT and both the 10 & 18 wire are brown. Both wires look to be different shades of brown maybe. I can't tell if they are different shade Browns or the same. But I took a chance and tried it and it worked. But I am concerned that I am wrong. But I looked, checked counted, looked, checked, counted etc. I even disconnected it made sure it went back to fogs turning off when high beams were on. Hooked it back up and the fogs came on with high beams. THOUGHTS???

[illsniggles]

Awesome, cheap mod! did this about 20 min ago. Took a little longer than expected but got it done and im very happy with it. Thank you everyone, this forum is very helpful!

 

 

-mike

 

 

 

 

 

still cant figure out why these F***** pics are sideways

[Spurshot]

This has not been covered from what I can find but I have a 2015 GMC 1500 SLT and both the 10 & 18 wire are brown. Both wires look to be different shades of brown maybe. I can't tell if they are different shade Browns or the same. But I took a chance and tried it and it worked. But I am concerned that I am wrong. But I looked, checked counted, looked, checked, counted etc. I even disconnected it made sure it went back to fogs turning off when high beams were on. Hooked it back up and the fogs came on with high beams. THOUGHTS???

The table shows 10 should be brown with a white stripe and 18 should be brown with a violet stripe.

[jonboy77]

This has not been covered from what I can find but I have a 2015 GMC 1500 SLT and both the 10 & 18 wire are brown. Both wires look to be different shades of brown maybe. I can't tell if they are different shade Browns or the same. But I took a chance and tried it and it worked. But I am concerned that I am wrong. But I looked, checked counted, looked, checked, counted etc. I even disconnected it made sure it went back to fogs turning off when high beams were on. Hooked it back up and the fogs came on with high beams. THOUGHTS???

 

I will go back and recheck what I know I have already varified. But I do know I am on the right ones. I will look for stripes on the brown ASAP. And post back. In the mean time if you hear do this from anyone else please,let me know. Thx john

[Chadwilliam1]

I need some help with another mod.

 

I have a 32" light bar behind my grill. Right now it is on a relay with a switch inside the cab. I am a little confused on how I can use the brights to control the light bar.

 

 

 

http://www.gm-trucks.com/forums/topic/175282-todays-mods/

 

Sorry for goinf off topic but I figured the peope in this thread could help.

[Showtime417]

Awesome, cheap mod! did this about 20 min ago. Took a little longer than expected but got it done and im very happy with it. Thank you everyone, this forum is very helpful!

 

 

-mike

 

IMG_1556.JPG

 

 

 

 

still cant figure out why these F***** pics are sideways

 

How did you get the 6Hi mod? 10-22 or 10-18 I know the Silverado is different from the Sierra seeing as we have hi/low/fogs

 

Thanks

[illsniggles]

 

How did you get the 6Hi mod? 10-22 or 10-18 I know the Silverado is different from the Sierra seeing as we have hi/low/fogs

 

Thanks

i used the 10-22. this runs the fogs off of the parking lights. be aware that once you do this you have no control of the fogs. there on automatically with the parking lights.

[Spurshot]

I need some help with another mod.

 

I have a 32" light bar behind my grill. Right now it is on a relay with a switch inside the cab. I am a little confused on how I can use the brights to control the light bar.

 

 

 

http://www.gm-trucks.com/forums/topic/175282-todays-mods/

 

Sorry for goinf off topic but I figured the peope in this thread could help.

 

Tap into the high beam circuit and run that wire to the switching circuit on relay you are running (not the circuit that powers your light bar). Here's the optional part. You can put your switch in line on this wire between the high beams and the relay, which will let you have high beams with or without the light bar.

[USAFASME7]

I just performed the #10 to #18 diode mod. Cost me $1.47 for 2 diodes at radio shack. Took me 5 min to install thanks to the pics in this thread.

 

Now, I have SIX lights blazing on the front of the truck when in hi beam mode. Awesome! Thanks again for the intel, guys!

[Chadwilliam1]

 

Tap into the high beam circuit and run that wire to the switching circuit on relay you are running (not the circuit that powers your light bar). Here's the optional part. You can put your switch in line on this wire between the high beams and the relay, which will let you have high beams with or without the light bar.

 

 

Thanks for the reply. I could use a little more input. The light I have is already on a relay that keeps 15 amps from going through the switch.

 

I have three lines going to the switch. The line coming from the relay and the line returning to the relay and the ground. If i take the wire returning to the relay. So from the switch to 87

Ground 85

30 back to the switch.

 

Does the relay need constant 12v?

[Lunch_box]

This is awesome. I used the method of connecting the diode to the I can harness. Literally took 45 seconds. So greatful to spurshot!!

[Lunch_box]

Just one question. Why do we use a diode for this mod and not a piece of wire.

 

The local electronics guy sold me a 1 A 300v diode. Anybody with electronic experience know if that's okay?

 

Thanks in advance.