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ElectronicsPete, Electronic Engineer
Category: Car Electronics
Satisfied Customers: 17395
Experience:  Over 16 years of experience installing and repairing electronics.
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I have a pioneer car stereo - Model #AVH-X3700BHS - that

Customer Question

I have a pioneer car stereo - Model #AVH-X3700BHS - that doesn't always power up, particularly when cold. It seems to be getting worse and worse and I got installed less than 6 months ago....
Submitted: 1 year ago.
Category: Car Electronics
Expert:  ElectronicsPete replied 1 year ago.

Hi there,

If the car battery is not fully charged, especially in cold weather, the stereo may not power up.

Test the battery, or try fitting a new battery.

If the battery is confirmed as good, then you will need to check for loose wiring or an intermittent fuse fault.

Customer: replied 1 year ago.
How do I test the battery?
Expert:  ElectronicsPete replied 1 year ago.

Hi Chris,

You will need to use a battery tester.

You can get one online (ask Santa!) or a local garage can test it for you:

Customer: replied 1 year ago.
OK. Tested the battery - totally fine. Checked the fuse - totally fine. Still having the same problem. Please advise.
Expert:  ElectronicsPete replied 1 year ago.

How did you check the fuse? If the problem is intermittent the fuse may still test ok..

Try fitting a replacement fuse.

Also check for loose wiring connections that may intermittently connect.

Customer: replied 1 year ago.
put in another new fuse - radio still not turning on
Expert:  ElectronicsPete replied 1 year ago.

Ok, then the next step is to bench test it by removing it from the vehicle and powering it up on a bench to see if the problem can be replicated. If the problem does not occur when bench tested, then there is a fault somewhere in the vehicle's wiring.