Just wondering if anyone can assist with some parking light troubles. On my 2.0 litre 1988 2WD Ranger the problem is that I have no rear 'parking' lights, regardless if the truck is (key in) running or not and switch on. This is an issue as you cannot see me from behind at night unless I'm signalling or braking. Regardless of pulling the parking/driving light switch to either the parking or driving light position, there is no illumination from the rear lights. There is, strangely, the front marker and driving lights on. I have not removed the swith as its behind the instrument cluster. Is anyone familiar with it enough to know if the parking light switch has two tabs; one circuit to the front parking lights and one circuit to the rear parking lights?? I've checked the fuses which have tested alright and changed rear lamps. The connections from the wiring harness under the rear bumper is in good shape and found voltage (+11.7v) on the 'parking' tab in the lamp holder. The Turning/Brake filaments did test properly (as this is a different circuit) & work properly. As you may know, the bulb is a typical two filament lamp. Also - I checked the Ground inside the rear lamp holder to the vehicle body and there was continuity to ground. I cannot understand how there could be voltage right to the lamp holder but not enought to illuminate the rear lamps. I'm thinking high resistance, but again the lamps were replaced. (the same lamp has the brake and signal function work fine..) Help! I can't drive at night..

Looks like you have checked all your bases. My dad had an 87 2.3 with the same problem and my tests turned out like yours. he had his lamps in backwards and the short pole didnt touch the contact. but after i turned the bulbs around the right way they were so dim you couldnt see them from a distance. what i did was, disconnect the ground and clean the hell out of it. 15 years of dirt and corrosion will do it every time. i changed all the grounds with fresh 16 awg and relocated the ground to the frame. then i followed the wire harness all the way up and found a stick in the conduit that cut a wire, after some solder and heatshrink the lights workd like new. check it out, hope it helps ya... TJ

Sounds like everything is working to the socket. Try cleaning the sockets or go to AutoZone, Advance and see if they have replacement sockets in the Help isle. Or, run a new ground to the socket and see if it helps. Ryan