Re: 1955 Packard 20amp fuse blowing
Posted by HH56 On 2019/10/10 21:55:50
Am assuming you are speaking of the body feed fuse under the dash and if so, that fuse feeds quite a few items. Here is the basic list but in addition, a couple of more things it protects are the rear seat cigar lighters and the trunk light.
A few known issues are the rear cigar lighters can short and if one is stuck depressed or worn so it is cocked or has a sloppy fit in the lighter socket it could be the problem.
The wiring to the trunk light assy can get caught in a hinge or get pulled and shorted in one of the clamps as it makes the transition to the lid, the glovebox light has a small tab like terminal on the end of the wire that inserts in the lamp assy and if it gets pulled out could be shorting.
The wires to the outside courtesy lights on the fender could have moved away from a sort of secured area where they feed thru to the lights and gotten caught in a rear window mechanism.
The body loom exits the left kickpanel space thru a notch at the bottom and is clamped to the floor for a few inches. It could have worn at the notch or clamp area or continued foot pressure over the years could have damaged the power wire somewhere in the loom along its path.
In a 55 that fuse also feeds the brake light switch so a shorted original 3 terminal brake switch or a faulty conversion mod if that has been used to replace the original switch could be a problem. The light green wire that exits the brake switch or conversion kit is powered all the time the brakes are not energized. It goes under the dash to the torsion level on/off switch at the left underside of dash. The wire terminal could have pulled out of the switch and shorted. If those terminals are OK and switch is on then the lt green wire continues on down to the TL control switch and something could have damaged it under the car.
If you don't have a 55 wiring diagram one can be downloaded from the literature section.
Attach file:
(26.26 KB)
A few known issues are the rear cigar lighters can short and if one is stuck depressed or worn so it is cocked or has a sloppy fit in the lighter socket it could be the problem.
The wiring to the trunk light assy can get caught in a hinge or get pulled and shorted in one of the clamps as it makes the transition to the lid, the glovebox light has a small tab like terminal on the end of the wire that inserts in the lamp assy and if it gets pulled out could be shorting.
The wires to the outside courtesy lights on the fender could have moved away from a sort of secured area where they feed thru to the lights and gotten caught in a rear window mechanism.
The body loom exits the left kickpanel space thru a notch at the bottom and is clamped to the floor for a few inches. It could have worn at the notch or clamp area or continued foot pressure over the years could have damaged the power wire somewhere in the loom along its path.
In a 55 that fuse also feeds the brake light switch so a shorted original 3 terminal brake switch or a faulty conversion mod if that has been used to replace the original switch could be a problem. The light green wire that exits the brake switch or conversion kit is powered all the time the brakes are not energized. It goes under the dash to the torsion level on/off switch at the left underside of dash. The wire terminal could have pulled out of the switch and shorted. If those terminals are OK and switch is on then the lt green wire continues on down to the TL control switch and something could have damaged it under the car.
If you don't have a 55 wiring diagram one can be downloaded from the literature section.
Attach file:
(26.26 KB)
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