Aftermarket radio

Tiny
BASEY_33
  • MEMBER
  • 1984 CHEVROLET BLAZER
  • 5.7L
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Hello I’m having problems wiring up my aftermarket radio to my old truck. I have it hooked up but I recently discovered it doesn’t turn off when the truck is off. So my battery drains and I cannot figure it out.
Wednesday, July 17th, 2019 AT 7:10 PM

3 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

There are two power wires going into your aftermarket stereo, a red wire and a yellow wire. The red wire is your stereo's Switched Power wire and needs to be hooked up to switched power fuse(Hot in Run or Start). The yellow wire is the Constant Power wire and needs to be hooked to a fuse that is Hot at All Times. This will keep your battery from draining. Please get back to us with how everything turns out.

Thanks,
Alex
2CarPros
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Wednesday, July 17th, 2019 AT 8:07 PM
Tiny
BASEY_33
  • MEMBER
  • 2 POSTS
How do I do that?
And my red wire is orange.
I don’t know if the previous owner did that or what.
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Thursday, July 18th, 2019 AT 4:57 PM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

Okay, on the connector that plugs into the back of aftermarket stereo there should be a red wire coming out of the connector. Connect that wire with a butt connector to the wire from a fuse tap that you will install in the radio fuse from the fuse panel. I have included a diagram of your vehicle's fuse panel in the diagrams down below with the radio fuse highlighted. You can purchase a fuse tap at any auto parts store. Next run a wire from the yellow wire coming out of the aftermarket stereo connector to a wire coming from the battery's positive terminal, which needs to have an inline(15 Amp) fuse, with a butt connector. You can also purchase an inline fused pigtail with a ring connector for installation on your battery's positive terminal at any auto parts store. This should make your stereo work properly and retain any programmed memory, while not draining your vehicle's battery.

Thanks,
Alex
2CarPros
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Friday, July 19th, 2019 AT 1:56 AM

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