DennisT
I'm Awesome
I began studying this subject back into last winter. Finally got bits and pieces of time and parts to convert my 1996 GMC K1500 back to 88/89 glass quad headlights using LMC's upgraded lamps, (that they had so much trouble keeping in inventory). All grill and headlight stuff is done. I found the attached wiring diagram a poster did on these forums. Seemed to be the best I found. Finished all of it today except laying down the 12ga. individual power wires to the actual headlamps. So I checked my work. Low bean trigger wires and high beam trigger wires seem to actuate the proper relays just fine. (I'm using the original wires from the GMC headlight switch.) I switch on low beams in cab. Sets the right relays and I get pass-through continuity/actuation on the high current coils. Then I click the steering column stick to high beam. Blue lamp comes on on dash. Now both relay sets actuate so I know I'll be getting all four headlights on together. WhooWheee. Oops. when I click the lever to go back to low beams only, the blue light stays on on the dash and I still have all four feds to headlights on. Ahhhhh. Somehow, I've created a, "latching," relay circuit. If I turn the headlight switch OFF, then back on it's fine again until I try to return from high beams to low beams. Latches again.
Thank you to anyone who can help. Dennis in E WA state
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I think I might need a diode, but don't know where to put it or what diode to get. Can anyone look at this diagram and tell me how to fix this??????? I'm right in the middle of it all after all this time and I've got to solve this.Thank you to anyone who can help. Dennis in E WA state