[Vwdiesel] 91 Jetta Headlite Switch

Roger Brown r.c.brown at ieee.org
Sun Oct 29 15:47:31 EST 2006


William J Toensing wrote:
 > I don't know if the Jetta has a headlite relay but many of these problems can be traced 
to all the headlite current being forced to go thru the headlite switch. This was a 
problem with my Citroens. On my gray market Citroen CX diesel, all the current went thru 
the headlite switch which would sometimes fail to work. I took it apart & repaired it but 
it was not as good as new & sometimes the headlites would go out when dimming the 
headlites. I didn't want to pay the $200+ for a new headlite switch  from our USA Citroen 
parts sources so I installed some foglites which I wired to a separate circuit & keep the 
foglites on when the headlites are on so that if the switch fails I'm not in the dark. I 
also wired in relays for both high & low beams to keep all that current from going thru 
the headlite switch. Does VW use headlite relays or does all the headlite current go thru 
the headlite switch? I think many manufacturers don't use headlite relays to save money. 
They also don't engineer these cars to stay reliable for 20+ years when resistance builds 
up in some circuits which was not a problem when the cars were new.

Usually a good idea to add a relay wiring harness to the headlights to take the load off 
that old headlight switch.
     http://www.4crawler.com/Diesel/CheapTricks/Headlights.shtml#WiringHarness
On the A1s, I understand the part is no longer available.


-- 
    Roger




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