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09-24-2011, 04:25 PM
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No Lo Beam, What Did I Do?
I had the dash down the other day. I now have parking lights, high beam, but no low beam. I am not good at using wire diagrams. All three wires are attached to the switch. Fuse #7 is good.
Jeff
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“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
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09-24-2011, 04:55 PM
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Quote:
Originally Posted by Jeff Frigo
I had the dash down the other day. I now have parking lights, high beam, but no low beam. I am not good at using wire diagrams. All three wires are attached to the switch. Fuse #7 is good.
Jeff
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What about Fuse #8? Check that for the low beams. If fuses 7 and 8 are good, then it pretty much has to be either the dimmer relay, the dimmer switch, or a connection between them. Try wiggling the connections and plicking the relay with your finger while you simultaneously hit the dimmer switch with the car ON. If all of that fails, I would replace the dimmer relay with VW Part # 111 941 583.
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09-24-2011, 04:55 PM
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I had this problem once when I pulled the dash and replaced it. I had pinched the wires and shorted out the circuit. The wires were pinched as they went around the heater.
m-a
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09-24-2011, 07:04 PM
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You probably bumped the relay. Grab the wires on the relay and wiggle them around a little bit. Your low beams will likely come back. I have the same problem with mine. I should probably just replace the relay, as that would be easier than reaching under the dash when the lights go out, but that is down on the list. And besides, I drive in daylight most of the time anyway. 
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09-24-2011, 07:54 PM
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Quote:
Originally Posted by patrickt
What about Fuse #8? Check that for the low beams. If fuses 7 and 8 are good, then it pretty much has to be either the dimmer relay, the dimmer switch, or a connection between them. Try wiggling the connections and plicking the relay with your finger while you simultaneously hit the dimmer switch with the car ON. If all of that fails, I would replace the dimmer relay with VW Part # 111 941 583.
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Patrickt:
I have low beams, fuses 7 and 8 are good. Also, I have a Triumph column. I'm sure I knocked something loose, I will crawl underneith tomorrow.  
Jeff
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09-24-2011, 08:22 PM
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Quote:
Originally Posted by Jeff Frigo
Patrickt:
I have low beams, fuses 7 and 8 are good. Also, I have a Triumph column.
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OK, with the Triumph column there is no dimmer relay, so don't bother replacing it.  Here's the wiring on it -- you must have pulled one slightly loose.
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Last edited by patrickt; 10-26-2016 at 01:49 PM..
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09-24-2011, 09:27 PM
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Best place I've found for replacing the headlight relay is airheads.com. I went through several relays before I bought one from airheads and then it finally worked correctly.
Mine went from high-beam, low-beam, NO-beam, completely unpredictably.
DD
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09-24-2011, 09:58 PM
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Quote:
Originally Posted by patrickt
OK, with the Triumph column there is no dimmer relay, so don't bother replacing it.  Here's the wiring on it -- you must have pulled one slightly loose.

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Patrickt, thank you. I must have missed this. I looked at the assy. manual, wiring diagram, connection diagram and adendums. PM me if you need to.
BTW my car is in the 100-334 car series, I don't know how applicable the above diagram is.
Jeff
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Last edited by Jeff Frigo; 09-24-2011 at 11:50 PM..
Reason: Added information
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09-25-2011, 06:22 AM
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The earlier car is a little different, but the operative wires haven't changed color. The old white, red and blue wires (#9, 10, and 11) are connected to the U/W, N/R, and U/R Triumph wires respectively with bullet plugs.
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10-02-2011, 09:47 PM
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Thank you as always, fixed.
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