<VV> Late model headlight switch - problem solved
David B. Neale
david.neale3 at ntlworld.com
Wed Nov 17 12:58:34 EST 2010
Well done, John, for fixing the problem. Fuses can be baffling, and for the edification of the good people on VV, I'll recount a story regarding an incident a few months back ...
The heater blower on my Corvair would not work. I made a visual inspection of the fuse-box, and levered out the blower motor fuse. It looked perfect, and so I removed the blower motor, which I then found, on bench testing, was worked perfectly. I then did what I should have done immediately ... test for voltage on either side of the fuse. Voltage was present on one side, but it was dead on the other. I levered out the fuse, and re-examined it. The wire ran through the fuse from one cap to another ... it was visually perfect. I then measured it with my meter ... initially, it seemed to be open-circuit, but in fact, when I tested for higher resistance, the meter showed the fuse was now a 2.5 Megohm resistor! For those of you into early radio, it would have made an excellent grid-leak.
I learned a valuable lesson there. It only cost me the price of a new fuse to get the blower motor running again .... plus the cost of all-new air ducts imported from Clarks to England.
Take nothing whatever for granted!
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