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No power when u turn key on

Tiny
BUSTER420
  • MEMBER
  • 1980 JEEP CJ7
  • 70,000 MILES
My jeep died and when I went to restart it I had no power. Battery is good, starter is good. I replaced the ignition switch and module but still no power. Some lights stay on in the stereo when key is off but when u turn on the lights go off
Thursday, May 9th, 2013 AT 11:31 AM

32 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
How did you determine that the battery was good?
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Thursday, May 9th, 2013 AT 11:48 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Checkthe fusible links off of starter relay seepic
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Thursday, May 9th, 2013 AT 12:24 PM
Tiny
BUSTER420
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  • 19 POSTS
I checked the battery.
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Thursday, May 9th, 2013 AT 12:50 PM
Tiny
BUSTER420
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  • 19 POSTS
I checked it
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Thursday, May 9th, 2013 AT 12:59 PM
Tiny
BUSTER420
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  • 19 POSTS
This is a dumb question but what does the starter relay look like
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Thursday, May 9th, 2013 AT 1:02 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Pic enclosed. Fusible link shold be attached where arrow is.
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Thursday, May 9th, 2013 AT 1:06 PM
Tiny
WRENCHTECH
  • MECHANIC
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The question was HOW.
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Thursday, May 9th, 2013 AT 1:07 PM
Tiny
BUSTER420
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  • 19 POSTS
I took it in and had it checked. I know its good. Plus I took battery out of my other car and tried it. Same thing no power
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Thursday, May 9th, 2013 AT 1:38 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
If it's an automatic, test the neutral safety switch, if it's a manual, test the clutch switch.
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Thursday, May 9th, 2013 AT 1:46 PM
Tiny
BUSTER420
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  • 19 POSTS
Where might the clutch switch be located
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Thursday, May 9th, 2013 AT 1:57 PM
Tiny
WRENCHTECH
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At the clutch pedal under the dash.
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Thursday, May 9th, 2013 AT 2:25 PM
Tiny
BUSTER420
  • MEMBER
  • 19 POSTS
I think the coil might be bad but that wouldnt keep me from getting power to everything would it. Plus wherr would the ignition relay be
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Thursday, May 9th, 2013 AT 2:36 PM
Tiny
BUSTER420
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Ther is no switch at all located on my clutch pedal anywhere under the dash
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Thursday, May 9th, 2013 AT 2:41 PM
Tiny
BUSTER420
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Mine doesnt look anything like that but I knowbi have power to the relay but not to the coil. That wouldnt cause me to have no power at all would it
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Thursday, May 9th, 2013 AT 3:05 PM
Tiny
BUSTER420
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Do I need to unhook them before I test
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Thursday, May 9th, 2013 AT 3:10 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Just probe the wire where they connect then follow it down to where they connect on wire and if you have power at both ends then they are good. What engine do you have cause I looked up your year and that is what is supposed tobe there unless you have the solenoid on the starter. Or has been changed. If the test light is bright at both ends or if volt meter shows same reading at both ends then links are good and yes it could cause no power to coil. If you look at diagram you shold have power to coil form relay on red t wire when cranking it can be a module problem as well though but you need to check this out and return with engine size if not able to get coil power.
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Thursday, May 9th, 2013 AT 3:23 PM
Tiny
BUSTER420
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I just replaced ignition switch and module. I cant seem to get power at the coil though. I have an inline 6
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Thursday, May 9th, 2013 AT 3:27 PM
Tiny
BUSTER420
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The coil being bad wouldnt cause me to have no power at all would it
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Thursday, May 9th, 2013 AT 3:29 PM
Tiny
HMAC300
  • MECHANIC
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Heres a diagram for your system recheck your work we have no idea what you did to this when you replaced parts so can't give a good answer. This is the way it's supposed to b e hooked up.
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Thursday, May 9th, 2013 AT 3:31 PM
Tiny
HMAC300
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No it would still have power
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Thursday, May 9th, 2013 AT 3:32 PM

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