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#1 |
Registered User
Join Date: Apr 2015
Location: Tennessee
Posts: 17
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Tachometer and Radio won't power up
Hey guys. I have a 79 C10 Silverado. Other than the few minor things I've done to it, it's all original. I've been doing some upgrades and fixing her up a bit.
I finally got the radio installed and it was working fine. A few weeks later, I started noticing the truck was running rich. I then decided to install a tachometer so I could adjust the carb. I decided to use the power running to the radio to power the tachometer. Now, neither the tach or the radio works. I checked the fuse and it's fine. Any ideas? Should I find another source to power the tach? I'm very much a newbie with cars, so break it down in laymen terms. ![]() Appreciate the help! Here's the tach I put in: http://amzn.to/1rz9TXx Here's my radio: http://amzn.to/1T5fd14
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1979 C10 - Silverado with sidestep |
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#2 |
Registered User
Join Date: Apr 2015
Location: Tennessee
Posts: 17
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Re: Tachometer and Radio won't power up
Any ideas? Thanks.
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1979 C10 - Silverado with sidestep |
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#3 |
Registered User
Join Date: Aug 2011
Location: Rockport, Tx.
Posts: 79
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Re: Tachometer and Radio won't power up
First thing I would check would be ground connections for both items----disconnect your tach (since the radio was working before you installed it)--- basically back retrace your steps.
I wouldn't wire the tach and radio in the same circuit--- Most aftermarket tachs have specific wiring instructions as to where wires go----sounds like either you missed a step or your tach is defective--- that's a cheap price by the way (for the tach) Good Luck! |
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#4 |
Registered User
Join Date: Jul 2011
Location: SW Ontario
Posts: 1,204
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Re: Tachometer and Radio won't power up
Swap the fuse (or do a voltage check on both sides of the fuse while its under load.
I can't tell you how many fuses I have come across that had a cracked filament. All looked fine visually, some checked out fine with an ohm meter, but putting a real load on them flexed the filamnent just enough to open the connection. Alex. |
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#5 |
Registered User
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,321
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Re: Tachometer and Radio won't power up
I have two fuses for my radio. Be sure you check both
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Chris _______________________________ 1979 Chevy Stepside SPORT 2018 Chevy Silverado, 39 years apart ![]() My build 2008-2016. http://m.imgur.com/a/bURrE |
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