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Roy T Posted on Aug 16, 2018
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1999 grand jeep cherrkee no fm when engine is running, good signal and sound in acc/on positions of ignition

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Marvin

Marvin

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  • Jeep Master 85,242 Answers
  • Posted on Aug 16, 2018
Marvin
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Joined: Jun 20, 2008
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I would suspect the ignition starter switch or a loose connector to that switch. See photo of switch below
1999 grand jeep cherrkee no fm when engine is runn - 1s5934__ra_p-m1h1iljzbpqzuvouet3yvvh3-3-0.jpg

  • 1 more comment 
  • Roy T
    Roy T Aug 16, 2018

    The radio AM and cassette still work, do you still think it's the Ignition switch?

  • Marvin
    Marvin Aug 16, 2018

    I have never heard of this, and I was a Jeep dealer tech, so I'm guessing. It could be a bad antenna ground as well.

  • Roy T
    Roy T Aug 16, 2018

    I did check the grounds on the antenna at the radio and on the fender as well, cleaned and put back together. So, I'll try the ignition switch as well. Thanks

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5 Related Answers

Anonymous

  • 115 Answers
  • Posted on Feb 27, 2009

SOURCE: remove the camshaft position sensor from my 1999 jeepcherokee

The Camshaft Position Sensor (CMP) on the 4.7L V - 8 engine is bolted to the front side of the right cylinder head. Disconnect the sensors connector. Take out the bolt that holds the sensor in place. Lightly pry out the sensor being careful not to break it. Clean out the hole and install the new sensor( put a little oil on the new sensors o-ring to help installation).

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Anonymous

  • 1 Answer
  • Posted on Apr 05, 2009

SOURCE: oil pressure gage at zero

I have the same problem,an erratic reading on the oil pressure gauge.I have been in touch with Chrysler Jeep (USA) and this is a common problem.The oil pressure sensor needs to be replaced this is on the oil pump by the oil filter.I changed mine and no more problems.

Bear

Anonymous

  • 4 Answers
  • Posted on May 22, 2009

SOURCE: Tapping sound when Engine running

it sounds like your timing chain needs replacing. Better get it seem to quick in case of trouble if it breaks.

Anonymous

  • 10 Answers
  • Posted on Jun 13, 2009

SOURCE: location of crankshaft position sensor Jeep grand cherokee 1997

left rear of engine block,on transmission bell housing.best way from top under brake booster use a wrench,

Anonymous

  • 33 Answers
  • Posted on Jul 10, 2009

SOURCE: acc positions on ignition switch will not work on 95 Chevy Astro

ignition switch not lock cylinder may need to be addjusted it's on top side of steering column under dash

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