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 > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 01-09-2012, 04:11 AM   #1
nrb's70gmc
Registered User
 
nrb's70gmc's Avatar
 
Join Date: Sep 2008
Location: magalia,ca
Posts: 366
lmc HD headlight harness gmc/4 lights

Hi everyone, i got 4 new h4 style headlights and a lmc hd headlight harness for my 1970 gmc for x mas.

i plugged the lmc 3 prong/male harness into the factory headlight low/high harness/plug nearest battery (as directed)


the factory headlight harness had the 3 prong/female light plugs on the outside low/high then the 2 prong/female high only to the inner lights.

so thats how i ran the HD harness.
I plugged the new h4 headllights in and the inner lights were on (for low) then the outer lights came on for high (opposite of factory) i cant figure out whats wrong. im really confused

---------------------------------on a side note--------------

the h4 lights that came with the new housings are all low/high 3 prong
(my mistake on x mas list)

when i tested the headlights (mentioned above) the inner lights were on low- but the outside lights were a very dim yellow.

when i clicked on high beams the outer lights came on but then the inner lights dimmed to a faint yellow.

i know i need to buy 2 H1 bulbs now.
i just dont know why the 2 prong inner lights came on (low beam)

i disconnected the HD harness and plugged original lights back in and they worked normal. 2 outer low beams on--- 4 on high beam.
__________________
1970 2wd 3/4 ton- 2004 crate 350 thorley tri-y headers-edelbrock performer eps manifold 600cfm performer carb, crane cams energizer cam,lifters, dual 2.5 magnaflows, mallory HEI, powermaster 140 amp altenator, griffen aluminum radiator.(8 MPG)

Last edited by nrb's70gmc; 01-09-2012 at 04:30 AM.
nrb's70gmc is offline   Reply With Quote
 

Bookmarks


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 10:37 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com