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Go Back   ClassicBroncos.com Forums > 66-77 Ford Bronco > Bronco Tech

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Old 10/13/18, 05:09 PM   #1
DC_Gearhead
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2a fuse for instruments

Seems like an obvious answer but figured Id toss it out there anyway. The 2a fuse in the panel that supplies the instrument panel should have 12v when key is on, right? No key position puts 12v to it.

By the way no gauges work and I just started working on getting the gremlins out of my electrical system tonight. First stop fuse panel...


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Old 10/13/18, 05:21 PM   #2
B RON CO
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Hi, you are correct. The fuse box has an input side from the battery and one fuse clip should have 12v wether the fuse is good or bad.
If the fuse is good, both fuse clips should be hot when the key is on.
Good luck
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Old 10/13/18, 05:34 PM   #3
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Quote:
Originally Posted by B RON CO View Post
Hi, you are correct. The fuse box has an input side from the battery and one fuse clip should have 12v wether the fuse is good or bad.

If the fuse is good, both fuse clips should be hot when the key is on.

Good luck


Crap. Was praying it was some weird old school grounding technique. Reverse polarity or something. LOL

Wires coming out both sides on the back of that 2a are light blue with red stripe. Im not seeing that combo on the diagrams I have for a 68. Trying to track it down without taking old tape looms off.


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Old 10/13/18, 09:11 PM   #4
Broncobowsher
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The fuse is a little funny.

Normally power goes through the fuse first, then the switch, then the load.
But the dash lights are different. Power comes from the switch, then the dimmer (on the switch), then to the fuse in the panel, and finally to the lights

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Old 10/13/18, 11:20 PM   #5
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Yes, what he said. That's not power for the instruments themselves. Only for the dash illumination.
So power is only going to be there when the headlight switch is pulled out at least one notch and the rheostat is not turned off.

Paul

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