11-25-2009, 06:53 AM
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CC Member
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,409
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The Lucas dash switch routes power to the parking lights, dash lights and the trip circuit on the headlight relay. Headlight power does not pass thru this dash switch. (NOTE: Newer SPF chassis also have a tap for driving lights from this same switch, which would run to another relay which is not provided with the chassis).
The wiring feeding the headlights from the headlight relay is 1.5mm. (1.5mm translates to approx. 14.7ga) to each headlight bucket from the relay and the wire length is approx 8 feet long to each headlight. There is a 2mm power feed to the headlight relay which actually supplies the power to the headlights.
I have a call into WISCO for information on the wiring supplied with the lighting units. No reply as of yet. My car is in winter storage or I’d pop a lens off and take a look.
I totally agree the 90/130 bulbs are too much for the standard wiring. But I believe the problem with the fusing headlight relays is the momentary power surge when you switch between low beams and high beams. You are running both bulb filaments for a split second.
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