Side mirrors and Stereo not working

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Side mirrors and Stereo not working

Postby Khrizz07 » Mon Jul 19, 2021 10:38 pm

Hello guys,

Recently got the trooper back from the shop for a transmission service but they ended by switching the ignition since they caused a misfire and transmission was not switching gears (asked this on another thread). They fixed it and trans is working fine now but the side mirrors, stereo and the clock are not working. Checked the fuses but all are ok. All other electrical stuff is working good (windows, door locks, sunroof, wipers). Wondering if anyone has had a related problem before and what else I've missed to check.

Thanks.

Have 99 trooper 3.5
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Re: Side mirrors and Stereo not working

Postby Buster28 » Tue Jul 20, 2021 5:28 am

The Audio system, Power Mirrors and Clock are all on the same circuit. Remove fuse C-11 and test it with an ohm meter. If the fuse is OK, see if +12 Vdc is supplied to the C-11 fuse socket with the Ignition Switch in the Run or ACC position using a voltmeter.
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Re: Side mirrors and Stereo not working

Postby Khrizz07 » Tue Jul 20, 2021 11:48 am

Buster28 wrote:The Audio system, Power Mirrors and Clock are all on the same circuit. Remove fuse C-11 and test it with an ohm meter. If the fuse is OK, see if +12 Vdc is supplied to the C-11 fuse socket with the Ignition Switch in the Run or ACC position using a voltmeter.


Thanks. The first time, I checked this fuse and fuse was blown. I replaced it, but nothing happened. Yesterday I went and checked again this fuse and was blown again, not really sure why.
Shop guy told me there were some wires being in a socket position to another fuse but I didn't know to which ones. Maybe this socket is not getting power.
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Re: Side mirrors and Stereo not working

Postby Buster28 » Tue Jul 20, 2021 1:16 pm

Something is causing more than 10 amps to be drawn by the fuse C-11 circuit, time to start troubleshooting.
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Re: Side mirrors and Stereo not working

Postby Khrizz07 » Tue Jul 20, 2021 1:43 pm

Buster28 wrote:Something is causing more than 10 amps to be drawn by the fuse C-11 circuit, time to start troubleshooting.


And what if instead of using a 10A fuse I use a 20A or higher?
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Re: Side mirrors and Stereo not working

Postby Buster28 » Tue Jul 20, 2021 4:05 pm

If you increase the size of the fuse by 100% the wiring will likely become the fuse. You may cause a fire and burn your truck to the ground. Installing a larger fuse is not the solution to the problem.
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