[V6-12v] Euro headlights

George Tur getur at optonline.net
Thu Nov 25 10:03:46 EST 2004

On Thursday 25 November 2004 07:51, Roger M. Woodbury wrote:
> Yup. There are several "fixes" archived on the V8 list, including
> installing a jumper to bypass the circuit.  That will disable the Autocheck
> system for the headlights, which I don't mind, but still doesn't explain
> why I have no trouble with the V8 and do with the 100.  I am wonder if
> there is something that is different with the system in the later car than
> in the Type 44 cars?
I believe if you have a relay setup where one relay handles both low beams and 
one relay that handles both high beams then you will have the autocheck give 
a bulb out warning. The system in this sort of setup sees an imbalance in the 
resistance to the low beam circuit. If you have a relay setup where each low 
beam bulb and high beam bulb is relayed, a four relay system versus a two 
relay system, then the system sees a balanced resistance across the headlight 
circuit and doesn't trigger an autocheck warning. That's my layman's 
understanding of the headlight autocheck issue. Take a look at the relay set 
up on the V8 and see if it has more than one relay for the low beams.

George Tur
91 V8

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