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Engine shuts off after driving twenty to thirty minutes

Tiny
JAKE TC
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Still don’t know what fan has to do with this.
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Saturday, December 22nd, 2018 AT 1:05 PM
Tiny
JAKE TC
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Just took truck for drive as long as heater fan switch on little truck lights it up in three gears. Runs awesome go figure.
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Saturday, December 22nd, 2018 AT 2:26 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi again.

I just spent an hour looking through schematics and I may have an idea. Power to the blower motor originates at the opposite end. In other word, when you turn the switch on, power is allowed to pass through supply (fuse), through the blower motor, then the resister, and enter the switch, which provides a ground. See picture 1

With that in mind, the switch is also connected with the ECU to operate the AC. When the blower motor switch is in the off position, there is no ground provided. However, as soon as you turn it on at any speed, a ground is provided. With that in mind, I feel we have a ground issue.

What I need you to do is start cleaning and inspecting grounds under the hood and in the passenger compartment. Also, check around the battery for body grounds as well as the main ground strap.

What are your thoughts on my theory?

Let me know.

Joe
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Saturday, December 22nd, 2018 AT 6:20 PM
Tiny
JAKE TC
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I’m in because grounding is the first thing I look at when it comes to electrical.
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Saturday, December 22nd, 2018 AT 8:55 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Let me know what you find. I wish I was there to help. I love a good challenge. LOL
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Sunday, December 23rd, 2018 AT 5:58 PM
Tiny
JAKE TC
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I will but won’t be for a week. I like a challenge too.
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Sunday, December 23rd, 2018 AT 6:01 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Take care and I hope you have a nice Christmas. Let me know.

Joe
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Sunday, December 23rd, 2018 AT 8:05 PM

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