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Old 08-02-2012, 05:52 PM
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Blew a in line fuse installed per GM CD on 75 TA tachometer

Just bought a new tach for 75 TA and looking at 75 Pontiac CD manual, it says to have a 1 amp line fuse installed. I didn't see any in fuse holder there before we installed it.
It blows the 1 amp fuse so now I'm wondering what amp fuse should the new tach have 5, 10 20 amp or none? I don't want to melt down a new tach.

What has been your experiences on something like this.


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Old 08-04-2012, 04:39 PM
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in the factory wiring there should be a fuseable link allready in the line which is located as the pigtail that plugs into the distributor this should give the circut plenty of protection
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Old 08-04-2012, 07:27 PM
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What's a CD manual? Detail would be nice.
The load of the tach should be stated in the instructions. If not use 5 amps.
Then size the wire per the load. #18 minimum.
Then size the fuse for the circuit. 5-10 amps.

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