Author Topic: Guage Lights Blows a Fuse  (Read 204 times)

Offline money pit

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Guage Lights Blows a Fuse
« on: December 30, 2019 - 11:25:11 PM »
On my 70 Barracuda, I installed 4 additional guages. A tach, oil pressure, a voltmeter, and a temperature guage. To light the guages, the installation instructions says to tap into the wiring for the stock gauges. I connected 2 of the guages, the fuse blew. According to the fuse panel the instrument lights uses a 3A fuse, all the other fuses are 20A. I went right off the fuse panel. Should I tap into the circuit someplace else? Can I put in a slightly larger fuse, like a 5 or 10A? FYI have LED dashlights.  Thanks




Offline 70chall440

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Re: Guage Lights Blows a Fuse
« Reply #1 on: December 31, 2019 - 11:16:47 AM »
a couple of things here, first is that adding the gauge lights is not what popped your fuse I do not think, those lights (all of them to include the dash) should not be drawing more than 3A. So, a couple of possibilities here

1. the fuse was about dead anyway and the additional draw from the gauges killed it (possible, not probable)
2. your new gauge lights have a short some place; meaning the wire from the gauges or the lights themselves is touching a ground. (probable)

I would put in another 3A fuse and try it again, if it pops then you know you have a short. You will need to discover what it grounding out.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
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Offline money pit

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Re: Guage Lights Blows a Fuse
« Reply #2 on: December 31, 2019 - 02:29:39 PM »
I'm 99.9% sure the the lights in the additional guages are not shorted. I'll double check them. I think you are correct in the old fuse being ready to go. All the fuses look like the original.  Thanks.

Offline 70chall440

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Re: Guage Lights Blows a Fuse
« Reply #3 on: December 31, 2019 - 09:06:16 PM »
No worries, I am sure you will get it figured out.
Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)