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Thread: High beam mod write up
05-26-2009, 02:14 PM #1
High beam mod write up
this mod lets your low beams stay on when you turn on your high beams. This is for 88-98 models only though.
1. 4 prong relay(#85,#86,#87,#30 prongs)
2.16 gauge wire (4 different colors Green,Brown,Red,Black)
4. electrial tape
5. self tapping screw
6. 4 female wire connectors
7. 1 ring terminal for battery
8. 1 ring terminal for ground
9. 2 side by side wire connectors
10. 1 inline fuse
Most of these items I already had. I think I only spent like $10 total.
You can get the relay and everything else at autozone.
The wires that you need to splice into are located between the battery and the pass. side headlight.
It is not nessecary to remove the headlight but removing the grille will definatley make it easier to access the wires.
1. Using 1 side by side connector clip a length of brown wire to the brown wire of low beams.
2. using the other side by side connector clip a length of green wire to green wire of high beams.
3. make sure you leave enough wire to run to the relay.
4. locate the relay on the fenderwell, the closer to the battery the better.
5. using the self tapping screw, attach the relay to the fenderwell.
6. Run brown wire to #87 on relay with female connector.
7. Run green wire to#86 on relay with female connector.
8. Run black wire for ground to fenderwell( I found a bolt that was close to attach the ground. Or
you could use another self tapping screw.)
9. attach ground wire to #85 on relay.
10. Run red wire from #30 on relay to inline fuse then to positive battery terminal.
11. Wrap wires in conduct, secure ends with electrial tape.
12. Reassemble everything and your done.
Last edited by bartlett; 05-27-2009 at 02:19 PM. Reason: MISSPELLED WORDS
05-27-2009, 09:10 AM #2
Great write up, I will try it on my Suburban.
I renamed the title to make it a little more clear (I thought it was a 4wd high mod) and moved it to the "How-To" section.
99 K 1500 Suburban
78 Silverado Big 10 w/factory 454
00 S-10 Blazer
1976 Trans Am
1980 Honda CB900 Custom
05-27-2009, 11:39 AM #3
There are a couple of ways you could go with the 4-High Headlight Mod.....there is a 4-High kit from Stylin Trucks....below are 2 4-High Headlight Mods,
It took all of 10mins to install this 4-High headlight mod kit on my Truck.
Last edited by 99'HEARTBEAT; 08-07-2011 at 12:55 PM. Reason: Added Infor.
5.3 l 3.73 l G80
BLACK BEAR CUSTOM TUNE
SNUGTOP l COLORMATCH l KATZKIN
05-27-2009, 02:21 PM #4
This way is only done on the passenger side. The wires are tied together, from drivers side to pass. side.
the old dirty dirty
06-08-2009, 10:12 PM #5
Awesome! Thanks for the write-up! I've seen the kits for this for later model trucks, but none for my '75. I'll be doing this very, very soon!
07-16-2009, 11:14 PM #6
11-12-2009, 09:43 PM #7
Great write up thank you =D i actualy did this the day after i read it.------------------------------------------------
1996 Chevy silverado z71
*6 inch Rancho Lift|36-12.50-15 Super Swampers*
*Bullet Rebuilt Motor|Aero Turbine Exhaust*
*De-Molded & De-Badged|6000k Hid's*
*Underdrive pulleys|Sierra grill swap =D*
11-24-2009, 01:18 PM #8
This method isn't working on my truck, and I'm having issues getting it back to normal now. I may have hooked up a wire wrong, but I think it's right. When I have the relay set up everything works like normal, but no 4hi. It effectively accomplishes nothing. When I turn the truck off I have to disconnect the +12v to get the low beams to turn off. When I tried to revert back to stock I am getting extremely low voltages from my headlights on the drivers side (the side I did the mod on) now. Any clues?
12-16-2009, 07:39 AM #9
03-17-2010, 11:05 PM #10
- Join Date
- Sep 2007
Anything like this for the '04??? I would love to do this.
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