At some point in our 1988 110's life a PO had a problem with the left side headlight and ran a new wire form the fuse box. When I got a hold of it I removed the wire and left side fuses and installed an ARB headlight relay kit that worked off of the right side. Its been working fine since I installed it last winter. We just had the motor swapped and this problem came up. With the key on and the headlight stalk in the first position (driving lights) I get approx 9 volts to the headlights causing the relay to buzz. With the key off no problem. Everything else works like it should, headlight come on, high beams work. I figured it was the switch so I replaced it and the blinker stalk with Lucas parts but no joy. I pulled the fuse and still measure 9 volts so its between the fuse and dash. Is there anything else I should be looking at before I dig into the dash? My Hazard switch is broken also and I'm waiting on delivery.
resistance on the wire due to over load or corrosion...you may need to install a new wire same route origin and end just to replace the bad wire. trace and correct concern.
you're running a relay if I understand correctly on the head light circuit, if so you should not have a such significant current drop, but rather the relay should maintain a sustained current flow equal to origin.(if engine off and good battery 12 to 13 volts...engine running 13 to 14.6 volts at headlight socket)
the truck ran like a "raped ape"
A fussy warm weather creature...
It turns out it was this dim dip relay pos. It's like pulling a tooth, yanked it out and aaaaahh. All better. I have now idea why it decided to start working , and I don't care
Now for some beer, cheers