Why won't my radio work

Z63

MEMBER
2008 FORD F-150
80,000 MILES

My battery was jumped backwards in my 08 f150, and now the stereo won't work. Everything else works fine. Checked fuse under the dash it's good. Any suggestions?

Tuesday, October 2nd, 2012 AT 4:03 AM

5 Replies

CARADIODOC

MECHANIC
33,916 POSTS

There's two fuses; one for the switched 12 volts and one for the memory circuit. The memory circuit is typically tied in with something else that's always hot, like the interior lights, horn, or cigarette lighter. On a lot of newer cars the radio needs a turn-on signal from the Body Computer. Computers don't like reverse polarity from jumper cables hooked up backward, but it is very unlikely that computer could have gotten damaged and the radio is the only thing affected.

Here is how you install a new radio

https://youtu.be/jF_sDSS0n7I

Please run down this guide and report back.

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Tuesday, October 2nd, 2012 AT 6:03 AM

USMC.2123

MEMBER
1 POST
2004 FORD F-150
180,000 MILES

Radio in 2004 ford f150 lariat is not working. Want replace the radio 4L3T-18C815-AM. Can I replace with any radio from say 2004 to 2008 fords? Took the truck to a radio repair shop and they checked the system and said it was the radio. I want to replace with a ford so I can retain the steering wheel controls. Want to buy a radio, but can I extend the replacement from other year f150s?

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Tuesday, July 30th, 2019 AT 7:08 PM (Merged)

HMAC300

MECHANIC
48,601 POSTS

Not sure on this, you may have to have the radio programmed to your truck. Ask a dealer they would know.

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Tuesday, July 30th, 2019 AT 7:08 PM (Merged)

GLENAGAIN

MEMBER
1 POST
2001 FORD F-150
3.6L
V6
2WD
AUTOMATIC
200,000 MILES

My factory stereo system has power, all functions work on the display, but I get no sound. Occasionally it will play then stop again.

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Tuesday, July 30th, 2019 AT 7:08 PM (Merged)

STEVE W.

MECHANIC
13,573 POSTS

Most likely a fault in the amp in the unit or as it does work now and the a bad/loose speaker connection on the read of the dash unit.

You can test the speakers by holding down the three and six preset buttons until it enters test mode. If you hear no sound during that test, the head unit or cable are bad. I would pull the radio and double check the connections, then go from there.