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Old 09-07-2005, 07:37 PM
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Maxi Fuse Problem

Hi, I wired my 51 chevy with a painless system, I used the Maxi fuse as required. I have been driving it and using all the electrical systems for about 120 miles with no problems. I took the car into the paint shop to have some flames put on the front. They took the grill off and the parking lights, everything working fine. So today while fitting the grill and putting things back on the front, someone noticed a flash and pulled the Maxi fuse out and it did it's job by blowing. There was nothing on electrical wise but the fuse just blew (according to the shop, I wasn't there). Now what would cause a 50amp fuse to just blow when it has been working fine for months now. Could they have shorted something? or? How can I test the system to find out if or what is drawing power, can I test the fuse area with something to see how many amps are being drawn across the maxi fuse panel, or ? Thanks for any help you can give me.

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Old 09-07-2005, 09:08 PM
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Do you have relays for your headlamps? If so, the shop could have temporarily shorted the feed wire to ground for those relays. The only thing that will cause a Maxi fuse to blow is a short, nothing else. My bet is somone at the shop is not telling the whole truth.

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Old 09-07-2005, 11:59 PM
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Maxi fuse

Thanks Vince, I suspect you are correct, they were messing around in the front where all the fan, horn and light wiring is. Why would a Maxi fuse just all of a sudden blow, no key on no componets on etc. thanks for your imput, RT.
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Old 09-08-2005, 02:28 AM
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Doc here,

I would suspect some ham~handed trainee shot a sheet metal screw through the headlight harness.

The maxi would blow BECAUSE if wired right through a relay, the Coil is the only thing controlled by the switch, the MAXI should FEED the N.O contact 12 volts HOT at ALL times, and the C.W will be the headlights..He probably nicked this wire..No key or switch should be required on for that wire to blow.

I would CAREFULLY inspect the front harness before calling it all good.

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