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#1 |
Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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Questions for the headlight upgrade
Im thinkin of changin mine over to H4 lights here are a few questions for anyone who has done this......
1. Does the light kit come with the wiring harness for the new bulbs? 2. Anything special needed to make this work or is this plug and play? 3. Would it help to add light relays? Whats the difference if you have or have not the relays? Any information will help... Thanks Smitty ![]()
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71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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#2 |
Senior Member
Join Date: Nov 2003
Location: Brookings, SD
Posts: 10,497
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I did the converstion to mine. The new bulbs should plug into your existing wiring harnes.
I added relays to mine. I wanted to be certain I was getting all the juice I needed, and I didn't want to fry the original wire, I stepped up to higher wattage bulbs. There may be an FAQ on this that will give you better info. If there isn't - you should make one when you do your swap ![]()
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Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs. |
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#3 |
Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
|
Thanks,
So your bulbs pugged into the factory harness? Im thinkin of using the 50ish /65 watt bulbs, Everything I have read says the harness should be fine..
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71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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#4 |
Registered User
Join Date: Jan 2002
Location: WATAUGA,TX
Posts: 675
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H4 bulbs have the same 3 prong plugs as stock headlights. My son did the conversion from Ricks. It was plug-n-play. They were better, but he has since changed to those really blue bulbs ( that what 16 yr olds like) and they work great. He never did do the relays and they seem to be okay.
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72 2wd 307/AT/AC/TILT WHEEL 78 JIMMY HIGH SIERRA |
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#5 | |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,647
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Quote:
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#6 |
Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
|
Thanks for the input, my option now is who to buy from, I found an article on wiring up the relays and a guy who has the right connectors, I want to do this right, I dont want to hack up my harness.....
__________________
71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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#7 |
Registered User
Join Date: Nov 2004
Location: "Under Montana skies."
Posts: 1,836
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Done right, the headlight relay harness does not require cutting the factory harness. The tough part is finding the one connector that allows for one factory headlight connector to plug into the back of a connector that also plugs into one headlight, usually the one closest to the alt. madelectrical.com has good relay harness info, but I just noticed they've exceeded their bandwidth. Prolly because another headlight thread with mad linked came to the top today.
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'71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup. |
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