Sambor
New member
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- Location
- Weatherford, Texas
Lets see if I can get all this down so one of the electrical wizards can give me some advice. The truck came with both rear light assys. broken. the right was damaged pretty bad and the left was cracked. These were metal housings, not the composite. The right tail lamp acted like a turn signal-- it flashed when the turn sig. switch was put to right. No brake light at all but I just figured it or the socket was broken. Left side of the truck all worked perfect and the right front section of the truck worked fine. I got a pair of tail light assemblies with good bulbs plus spare bulbs. All check good with meter and power. I installed making sure all the grounds were good and clean both on the lamp housings as well as between the bracket and frame. When I powered up the truck and turned on the left signal the left tail, and the left brake light all worked perfect. When I did the same on the right, no brake light, tail light worked as the signal, and if you reverse the positions of the lamps( big bulb on top and little bulb on bottom) the little bulb on bottom still works as a signal, and top bulb never comes on. I removed the light assembly and powered it with a 24 volt power supply on each wire and all bulbs light up perfectly and per the wire number tags. So, I believe the light housing internally is fine-- all the sockets are grounded good and all the bulbs are good. Now for the truck-- I checked 22-460 which is the right signal rear and it shows 24 volts during the flash from the signal switch. It just won't fire the brake/turn signal lamp-- instead it fires the tail light bulb. I assume that for some reason the little lamp is in the ground circuit so it flashes instead of the big lamp. Ok, I disconnected the front harness for all the hood lamps at the left fender and all the rear right lamps quit. The left side still works, but now the left tail and brake flash together. I disassembled the turn signal switch and cleaned it-- inspected and found no cold solders/loose wires, burnt contacts. Checked the grounds at the flasher-- all good. Even installed some clips and wire for additional grounds-- no change. By the way, I read on here that the signal switch has to be grounded for the indicator light to work-- mine doesn't need the ground, light works just fine in either position-- and it makes no difference if I add a clip on ground wire. The tail light wire is #21 from the rear to the light switch and does not ever have any connections to the turn signals-- I figure maybe I have a ground or shorted wire somewhere, but am at a loss as to where to go now-- SO, any help or further advice would be appreciated, before I decide to tear into the firewall feedthru and check the wiring there. I did check the connector behind the left front tire on pin C&D--C is the right rear turn and D is the tail light circuit-- no continuity on the rear harness which is correct, but there is some on the front harness-- haven't checked between that connector and the hood connector yet--Sorry this is so long, but wanted to get it all out there for help, John R Dunn Weatherford Texas
