The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > Info Center > FAQ Truck Tech > 67-72

Web 67-72chevytrucks.com


Closed Thread
 
Thread Tools Display Modes
Old 12-08-2005, 12:30 AM   #1
matt67350
Registered User
 
matt67350's Avatar
 
Join Date: May 2001
Location: Benbrook, TX
Posts: 1,060
headlight relay install

I did this to my trucks after reading this:
Brighter Head Lights @ madelectrical.com. http://www.madelectrical.com/electri...adlights.shtml

1 Read the artical
2 Parts list 2 bosch relays, spade connecters, wire, and inline fuse.
3 Look at wiring sheet
4 Decide that you can do this
5 Start by finding the 14LG and the 18LT wire on the back of the left headlamp.
6 Disconnect the (-Neg) battery cable. Mount the relays to the core support above the horn. You may have to make room for them.
7 Follow the 14LG wire towards the fuseblock. Mark it. This is the one to cut.
8 Follow the 18LT wire towards the fuseblock. Mark it 1st. Cut this one also.
9 Do the wiring:
cut 18LT (or low beam) and run the wire from the fuseblock to Terminal 86 on the relay.
run the other end and that comes from the headlamp plug to Terminal 87 on the relay.
cut 14LG (or hi beam) and run the wire from the fuse block to the Terminal 86 on the 2nd relay. run the other end to Terminal 87 of the 2nd relay.
10 Terminal 85 goes to ground.
11 Run a heavy wire (12ga.) from + Battery Post to Terminal 30 of both relays. Just run it through the stock wiring across the radiator. Add a inline fuse on this one.
12 make sure every thing is connected, secure wires,
replace (- battery cable )
13 Enjoy Brighter Head Lights
__________________
69 swb stepside, rebuild and upgrade in progress

Last edited by matt67350; 01-24-2009 at 09:24 PM.
matt67350 is offline  
Old 03-14-2006, 04:53 PM   #2
Already Gone
60+ (Old Skool Club)
 
Already Gone's Avatar
 
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 7,637
Re: headlight relay install

I'm going to put a new Painless Wiring Harness in my truck. Will I still have to do this relay thing so my Tri_Bar headlites will work like they are supposed to.?
__________________
1972 C10 Custom/Deluxe 613 Highlander 350/TH350
1999 White Tahoe LS 4x2 with Z56 Police Package
1992 K1500 GMC Suburban

Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601

Compare yourself to who you were yesterday, not to who someone else is today !!.... Jordan Peterson


RIP Glenn Frey 1948-2016
Already Gone is offline  
Old 04-30-2006, 09:40 PM   #3
jugadro
that's right!
 
jugadro's Avatar
 
Join Date: Mar 2004
Location: Topsham, ME, USA
Posts: 101
Re: headlight relay install

Will this stop my headlight dimming when I stop at a stoplight? Man is that annoying.
__________________
70-K20-4X4
jugadro is offline  
Old 05-29-2006, 12:13 PM   #4
Longhorn Man
its all about the +6 inches
 
Longhorn Man's Avatar
 
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 82,703
Re: headlight relay install

Already gone, your new lights will work, but they'll work better with this mod. Also, this mod reduces the amount of amps going through the harness, into the cab, through the headlight switch, through the dimmer switch... so they all have less of a load. It increases the amps at the bulb, sop they burn way brighter.
jugadro, this won't stop the dimming all together... you should look into an upgrade on your alt to stop that.
Longhorn Man is offline  
Closed Thread

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:19 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com