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Radio, Instrument panel, display, AC cutting off #5331408 01/24/20 09:39 PM
Joined: Jul 2018
Posts: 125
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DrDanger Offline OP
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So I had the radio cut off a few times 2 months ago. Read up and installed a ground wire from battery - to chassis. Problem solved. Until..
Yesterday I got to do a 100 mile trip.
Radio, Instrument panel, display, AC cutting off started on the last 10 miles. They come back on, stay on for a 2-3minutes(sometimes) and then go out again. Car drives normally otherwise.
Drove 5 miles today and re-tightened any ground cable I saw. Still same thing. And airbag warning turned on.

What could be causing the issue?
I want to run a 4 AWG from alternator to battery + to try to solve it.
OBD II sees voltage dropping from 14.4 to 12.8V, but this is only OBD module voltage.
Still tells me alternator cable is loose or worse....
Any input appreciated.

Re: Radio, Instrument panel, display, AC cutting off [Re: DrDanger] #5331426 01/24/20 10:04 PM
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CT8 Offline
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Bad chassis ground?


2015 F150 2.7
2018 F350 6.2
Re: Radio, Instrument panel, display, AC cutting off [Re: DrDanger] #5331582 01/25/20 07:03 AM
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Trav Offline
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Is this a VW?


ASE L1, Master. Deutsch Meisterbrief.
Re: Radio, Instrument panel, display, AC cutting off [Re: DrDanger] #5331863 01/25/20 01:06 PM
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DrDanger Offline OP
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Car is a Peugeot 407 sedan, 2004, 90k miles, 2.0l petrol. Had not had time to check my thinking today.

Re: Radio, Instrument panel, display, AC cutting off [Re: DrDanger] #5332570 01/26/20 09:38 AM
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DrDanger Offline OP
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So far it looks like the fuse box ground was loose, contact sprayed it and so far, so good.
4 miles with no incident. A buddy mechanic said not to mess with battery plus to alternator.

Re: Radio, Instrument panel, display, AC cutting off [Re: DrDanger] #5332876 01/26/20 03:46 PM
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Trav Offline
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A common upgrade on many Euro cars is a 2 or 4 AWG alternator to battery and 2 or 4 AWG from battery to fuse box depending on alternator output and options the car has and 1/0 battery to starter.
VW got all sinister with very light cables that caused all sorts of gremlins, doing the upgrade really straightens them out to say nothing of the much faster cranking in cold winter temps.


ASE L1, Master. Deutsch Meisterbrief.
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