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Radio cuts out when braking

Posted: Fri Jul 06, 2018 9:04 pm
by Johnf1059
What would cause my radio to cut out usually when releasing the brake lever. I have a 94 GL1500 interstate with the factory radio. I installed a amp and new speakers. wired the amp straight to the battery for constant power and remote wire to the radio. I did this a couple of years ago and don’t remember the exact wiring scenario. Been putting up with it but it’s getting a little annoying. Any ideas? Thanks!

Re: Radio cuts out when braking

Posted: Sun Jul 08, 2018 1:51 am
by Uncle Fester
If I am reading this right, you loose radio when applying the brakes ? If that is the case, given the added amplifier and speakers, I would say not enough alternator for everything you have running off the battery. Upgrade to a 95amp alt and all should be happy again.

Re: Radio cuts out when braking

Posted: Mon Jul 09, 2018 7:43 am
by RBGERSON
I'd say wiring issues something shorting or loose??? Effected by brake lever movement and what it moves. Only on release???

Re: Radio cuts out when braking

Posted: Tue Jul 10, 2018 5:52 am
by Johnf1059
I believe it is when the brake light switch is making and braking contact. It does it with hand and foot brakes.

Re: Radio cuts out when braking

Posted: Tue Jul 10, 2018 1:13 pm
by WingAdmin
That sounds then like a bad ground. The radio's ground connection is broken (or partially broken), but it is also connected to the ground for the brake lights - both the brake lights and the radio use the G100 ground point as well as the C192 ground distribution tap.

When the brake lights are off, the ground works good enough. But when the brake lights go on, they use up whatever current capacity the ground point can handle, and the radio doesn't have enough ground to operate.

I would start by checking G100 and check it for corrosion or damage.

G100
G100

If that checks OK, check out C192, it is an orange connector on the left side of the tank behind the left cover. It's wrapped in electrical tape, so you will have to uncover it. It is a common failure point for bad grounds.

C192
C192


C192
C192


Re: Radio cuts out when braking

Posted: Fri Jul 13, 2018 10:28 am
by Johnf1059
Thanks I will check both grounding points when I get the time. I’ll let yas know what I find.