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Author Topic: Gauge fuse current rating?  (Read 442 times)

Offline Scaryfastatx

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Gauge fuse current rating?
« on: December 02, 2023, 10:12:47 PM »
Hey everybody, curious what current rating is the factory fuse on the gauges circuit?

My original fuse block had a 20A fuse on there

But my American Autowire Classic Update schematic and instructions say it needs to be 5A

But it's randomly popping. I checked the cluster and everything seems fine

Thanks
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Offline JohnnyPopper

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Re: Gauge fuse current rating?
« Reply #1 on: December 03, 2023, 06:18:13 PM »
Try an amp test and go with a fuse that's 20% higher.
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1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Online bd

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Re: Gauge fuse current rating?
« Reply #2 on: December 03, 2023, 11:26:57 PM »
Per the 1981 C10 factory wiring manual, the "GAUGES" fuse is 20 amps.
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline JohnnyPopper

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Re: Gauge fuse current rating?
« Reply #3 on: December 05, 2023, 09:33:07 PM »
What size fuse are you using?
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1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline Scaryfastatx

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Re: Gauge fuse current rating?
« Reply #4 on: December 08, 2023, 08:55:08 PM »
Quote from: JohnnyPopper on December 05, 2023, 09:33:07 PM
What size fuse are you using?

5A it's been fine the last week or so. I think maybe hot swapping the fuse for the courtesy light caused it to pop maybe
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Offline Scaryfastatx

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Re: Gauge fuse current rating?
« Reply #5 on: December 08, 2023, 08:56:08 PM »
Quote from: bd on December 03, 2023, 11:26:57 PM
Per the 1981 C10 factory wiring manual, the "GAUGES" fuse is 20 amps.

Ok awesome thank you.

I'm curious what American Autowire went to a 5A for that circuit
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