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I have a 2005 Peterbilt 387 and occasionally it will start…

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I have a 2005 Peterbilt...
I have a 2005 Peterbilt 387 and occasionally it will start flashing every gauge and light on the dash. It usually stops immediately and I regain power. Today it started blinking and the gauges went haywire and I lost everything even the motor. I coasted to the side of the road and let it sit for a minute and it fired right up. Do you have any Ideas what could be causing this short circuit?
Submitted: 8 years ago.Category: Medium and Heavy Trucks
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Answered in 13 minutes by:
5/21/2014
Technician: Cat Man, Cat Engine Expert replied 8 years ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
Verified
Hi. Thanks for asking your question and requesting me! I will try and help you out.

These types of problems can be hard to troubleshoot any aggrivating.

It sounds like there is a poor power connection somewhere.

I would start at the batteries and go to the starter and check every cable for tightness and poor connection. From there I would look at where power goes to the fuse box.

If needed next I would check the wires at the ignition switch.

Please reply back if you need more help or have more questions. I am happy to assist.
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Customer reply replied 8 years ago

we have checked the ignition and it is fine. I will check the others


Thanks

Technician: Cat Man, Cat Engine Expert replied 8 years ago
You are very welcome Chrissy.

Let me know what you find.

Also, if all if the things I mentioned are OK. I would try changing the ignition relay. It may be faulty and only act up from time to time.
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