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No electrical power

Tiny
TYLER CORRIHER
  • MEMBER
  • 1992 JEEP CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 99,000 MILES
When I turn the key I do not get any power to anything, no radio, no dash, no ignition, nothing?
Saturday, July 21st, 2018 AT 2:12 PM

21 Replies

Tiny
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  • MECHANIC
  • 52,797 POSTS
Good evening.

The first thing you need to do is check the battery. You may have low voltage.

If you have a volt meter, check the actual voltage.

Roy

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

https://www.2carpros.com/articles/car-battery-load-test

https://www.2carpros.com/articles/how-to-charge-your-car-battery
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Saturday, July 21st, 2018 AT 3:09 PM
Tiny
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Battery is good 14 volts.
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Saturday, July 21st, 2018 AT 3:18 PM
Tiny
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Then check for the same power to the fuse block under the hood. Make sure there is power to the fuses.

Make sure the battery cables are clean and tight.

Roy
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Saturday, July 21st, 2018 AT 3:20 PM
Tiny
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All the power is good, but is my ASD relay supposed to have two different volts to it?
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Saturday, July 21st, 2018 AT 3:22 PM
Tiny
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That is for the engine controls, yes. But that does not explain why you do not have dash or anything else. You stated it is completely out. The ASD relay does not control everything.

Roy
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Saturday, July 21st, 2018 AT 3:26 PM
Tiny
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Oh okay, well either way I do not have that, but I do have head lights and turn and brake.
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Saturday, July 21st, 2018 AT 3:27 PM
Tiny
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Okay, that is all new information you did not give us.

When you turn on the ignition, does the check engine light come on?

Yes, you have battery power and ignition power to the relay. The ECM grounds the relay to send power off to the ignition system.

Roy
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Saturday, July 21st, 2018 AT 3:35 PM
Tiny
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No, the check engine does not come on nothing does not, but I can turn my head lights on I do not have turn sorry.
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Saturday, July 21st, 2018 AT 3:37 PM
Tiny
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At this point, I would suspect an ignition switch. You need to check for power to the switch and see if there is any coming out of it.

Roy
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Saturday, July 21st, 2018 AT 3:41 PM
Tiny
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Is that the black box under the dash?
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Saturday, July 21st, 2018 AT 3:42 PM
Tiny
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It is at the bottom of the column. Picture and pin out attached.

Roy
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Saturday, July 21st, 2018 AT 3:48 PM
Tiny
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Would this be it?
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Saturday, July 21st, 2018 AT 3:53 PM
Tiny
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That piece is the high beam switch. That is bolted to the ignition switch. If you remove the high beam switch you will see the ignition switch.

Roy
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Saturday, July 21st, 2018 AT 4:02 PM
Tiny
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So I have one current to the plug the parking switch but nothing else.
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Saturday, July 21st, 2018 AT 4:12 PM
Tiny
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Plug? What plug? Parking switch?

I thought we were talking about the ignition switch?
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Saturday, July 21st, 2018 AT 5:02 PM
Tiny
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We are, the plug on the ignition switch according to the diagram is the parking switch that the only power is that.
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Saturday, July 21st, 2018 AT 5:05 PM
Tiny
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That picture shows the high beam switch and the ignition switch.
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Saturday, July 21st, 2018 AT 5:08 PM
Tiny
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Oh okay, so how do I measure for voltage on the ignition switch?
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Saturday, July 21st, 2018 AT 5:08 PM
Tiny
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You use a voltmeter. I sent you the diagram for the pins and color of the wires. Verify powers to the switch and then check for voltage coming out of the switch with the key on.
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Saturday, July 21st, 2018 AT 5:15 PM
Tiny
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There was no power coming out. Thank you for your time.
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Saturday, July 21st, 2018 AT 5:43 PM

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