During the installation of a trailer hitch, the tail light wire (brown) that runs along the left frame rail was crushed/shorted out. The wire is no longer shorted out, but now I have no tail lights, running lights, or dash lights with the head light switch in the "parking light" or the "headlight" positions. If you pull the switch all the way out so that the headlights should go on, and then push the **** in ... just slightly ... the dash/running/tail lights will work. I tried replacing the headlight switch, but it didn't help.

I suspected a fuse or fuse link, but haven't found any that were bad. I've got a Haynes manual, but the wiring diagrams appear to be incomplete and inaccurate.

Does anyone have an accurate wiring diagram for the '88 E150 that gives details of the headlight switch wiring ?

thanks

 

Is this what you want:

http://i54.photobucket.com/albums/g9...al/88E150P.jpg

http://i54.photobucket.com/albums/g91/subford/Electrical/88E150L.jpg

http://i54.photobucket.com/albums/g91/subford/Electrical/88E150L2.jpg

 

Well, it's been a while, and I should at least thank "subford" for the diagrams. Seems as though, not only was the Haynes manual diagrams wrong, but even the owners manual that came with the van is wrong. The diagram of the fuse panel shows the 15A fuse for the running/dash/tail lights in the wrong location. The only problem (besides the errors in the manuals) was a blown fuse. If anyone is interested, I can scan the owners manual and point out the error.

 

Was the drawings I posted wrong also?

 

I'm pretty sure your drawings were ok, though I didn't take the dash apart to confirm wire colors. What was significant was that the Haynes manual showed a common 12v input to the switch that fed both the headlights and the tail/dash lights ... which is incorrect. Your diagrams showed a different feed for the headlights and the tail lights, and also showed the 15A fuse for the tail/dash light before the switch. That prompted me to just start pulling/checking all fuses, and eventually found a blown one, which sure enough, fixed the tail/dash lights.