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Question

1998 T & C LX: right head light doesn't work on low beam. Head light is fine; the is not 12V on either head light contact on low beams with head light switch on. Where is the next place to look?

Submitted: 259 days and 2 hours ago.
Category: Chrysler
Value: $15
Status: CLOSED
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Posted by Dodgerench 259 days and 2 hours ago.

Info Request

Hi XXXXXXX, welcome to Just Answer!.

I'm a bit confused, BB... you said neither headlamp has power on low beam, yet only the right side doesn't light up?

Do you have good, bright illumination of both headlamps when switched to high beam?

Back in a bit,
Ed

259 days and 2 hours ago.

Reply

Did you receive my previous reply?

259 days and 2 hours ago.

Reply

The left head light functions just fine all the time. The right head light only works on high beam..even though the bulb is new. There is no voltage on either head light wire on low beam on the right head light..

Bob

Posted by Dodgerench 259 days and 2 hours ago.

Info Request

Sorry, Bob. I was in the books. Give me a few minutes and I'll be back with you. Thanks for the quick reply.

Ed

259 days and 1 hours ago.

Reply

Ed, Is it your turn or mine? Do you understand my question now?

Bob

Posted by Dodgerench 259 days and 1 hours ago.

Answer

Yes, I believe so.

It turns out these headlamp circuits are individually fused, Bob. Since they share the same initial feed (and one side works), the problem is with the second circuit, probably starting at the fuse.

Fuse 6 is the left low beam circuit, Fuse 7 is the right. Here's a pic of the Power Distribution Center (PDC), the underhood fuse block...

graphic
View Full Image


Check out your #7 fuse and let me know if we need to keep looking.

Thanks,
Ed

259 days and 1 hours ago.

Reply

Ed,
The fuse is okay, and I swapped it with onother for a test... to no avial.

Guess we need to keep looking.

What about the turn signal switch? does it go through there?
Bob

Posted by Dodgerench 259 days and 1 hours ago.

Answer

No, it's a feed from the low beam relay, also in the PDC. Did you check to see if power is present on both sides of the fuse once turned on, Bob? The PDC may have an internal splice problem that isn't transferring power to the circuit. I've seen some of these PDCs get pretty corroded inside...

I'll check some more stuff while you're doing that.

Ed

259 days and 1 hours ago.

Reply

Ed,
I've swapped high bead & low beam relays...both yield the same result (as we started).
The relay with the head light switch on yields 12v on contacts 86 and 30, and 0V on 87 & 85.

I have not gone below the relay sockets yet.

What now?

Bob

Posted by Dodgerench 259 days and 1 hours ago.

Answer

You might need to roll the PDC over and check connector C3 (violet wire) for power with the low beams on. That's not handy, especially since you pretty much have to take the battery out to do that. This might require some jumper cables to connect the battery to the van for power testing.

Here's the lighting circuit for headlamps...

graphic
View Full Image


Note the common feed from the relay and the internal PDC power splice. They emerge as violet/ red and violet colored wires but from two completely different connectors at the PDC base. I haven't been able to find a good diagram of the connectors, doesn't look like I'll be able to.

From the PDC, it appears there are no more intermediate connectors all the way to the right side headlamp, so it would have to be a broken wire between the two points or the PDC isn't feeding the circuit. It's hard to say where to start, but a quick inspection of the front wiring would be good. I'm not sure at this point just where the loom is routed to get to the right front corner of the van; maybe you'll be able to tell.

Your target wire color is violet (no tracer). See if you can locate it in the loom at a midpoint and test it there for power. Either way, you'll know which way to keep looking at that time.

I'll keep looking for a good C3 connector pinout and description (my diagrams rename the connectors, making the wiring diagram info worthless). You'd be looking for the same violet wire from one of those connectors as well.

Back in a bit!
Ed

259 days ago.

Reply

Ed,
I have to drive this car in the morning.

I see a red wire, and a black wire going to the head light.

Can I rig a jumper to it, or both high a low beam fed through the red wire? I'm not sure from your wiring diagram. If yes, how many volts for each, and where do they originate?

What is "G301"?

Posted by Dodgerench 259 days ago.

Answer

G301 is the ground source number, but since your high beams work, it has to be good. They share the same circuit.

A jumper would work for a short while... you bet. That's probably the best choice right now with the amount of daylight we have left (and the amount of disassembly that might be required).

Use a 16 ga. wire or bigger and fuse it if at all possible. Had you found power at either of the Fuse 7 terminals? That would be an ideal source to take it from.

Ed

259 days ago.

Reply

Ed, There is no power on the fuse.

Where can I jump to?

The high beam says 11.85Volts. I assume the low beam must be less since I see only two wires, and one element in the bulb

Bob

Accepted Answer

Any voltage source will do, but you've found your problem if there's no power supplied to Fuse 7. It's powered by an internal splice to the PDC, but might be repairable with a little work. Hard telling. But it does unplug, making replacement much easier than the types that have the harness hard-wired to 'em.

Voltage to either high or low beams will be the same... it just gets run to a different wattage filament for the difference in brightness and beam level. The wiring diagram is a little tricky in that the ground wire takes off to the bottom of the page.

Ed

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Expert: Dodgerench
Pos. Feedback: 100.0 %
Accepts: 
Answered: 3/9/2009

ASE Certified Technician

28-year Dodge/ Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist

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