Chrysler Repair: 2000 Chrysler Grand Voyager, chrysler grand voyager, beam intensity

Question
Hello Roland!
My van headlights both went out at the same time. I took it to Chrysler and they ran a diagnostic and said that the Body Control Computer needed to be replaced. We did and the headlights, only the low beam, will not work. We have tried the headlight switch, relays and fuses. I am stuck as they are too. Nothing came up as electrical in the diagnostic. Do you have any information on a headlight system or a wiring diagram?
Many thanks, I feel in the dark about this!

Answer
Hi Noelle,
Unfortunately I don't have the wiring diagrams for the 2000 van model. The most recent Chrysler diagram I have is for the '96 Cirrus/Stratus. That circuit looks pretty straight forward. If you can get either the high or the low beam then there is power getting to the dimmer switch. That switch would be the place where a failure of one or the other contacts within the switch would result in only being able to get one or the other beam intensity. There are 4 fuses, one for each filament on the two sides of the vehicle so have you checked the four fuses that might be identified in the "junction block" which is another name for the fuse box that should be located in the cabin, under the dash? If all 4 fuses are o.k., then I would remove the fuses and verify that when you apply the dimmer for high that 12V appears on one side of each high beam fuse. And then verify  whether if you  apply the dimmer to the low beam position that 12V appears on one side of each of the low beam fuse sockets. If it does, then the dimmer switch is o.k. If it doesn't then the dimmer switch is bad, or the wire from the switch to the affected fuse sockets is bad. From the fuse sockets the 12v goes through a couple of different connectors but in the cirrus if one of the connector failed it would take out 3 of the filaments (e.g. you would only get a low beam on one of the headlamps which would be a giveaway that that was the cause. You can check for 12v at the 4 fuse sockets using a simple neon glow tube placing one lead on a shiney metal surface nearby (ground) and the other on the socket pin you are interested in measuring. If the neaon glow lights, you have 12v, if not, you don't.
So if you want to check it yourself you could see if the dimmer switch is bad. You said the headlamp switch was 'done', by that do you mean the dimmer switch? or the headlamp switch? If not the dimmer, then I suspect the dimmer switch has a bad contact for whichever set of beams you aren't getting.
Follow up if you have another question.
Roland