Blown Fuse, Short to Ground - Ford Powerstroke Diesel Forum
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Old 06-30-2013, 11:21 AM
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Help finding Speed Control Servo

Hope someone can help with this.

My 2000 Excursion 7.3 is blowing the #6 15amp fuse in the Central Junction box under the dash.

I believe I have narrowed it down to the Speed Control Servo.

If you have a 2000 Excursion, F-Super Duty 250, 350, 450, 500 Ford Wiring Diagrams book you can follow along on page 13-16.

I have disconnected connectors C1049 from the fire wall and C1044 to the Digital Transmission Range Sensor, along with the Vacuum Hublock Solenoid and Vacuum Pump. The power to the Vacuum Pump is still going to ground (I connected a 15amp fuse to the + and the power side of the connector and it blew.

My problem is I can’t find the Speed Control Servo. The manual says it should be located where the vacuum pump is, but I don’t see it.

Can someone tell me where it is?

Well I can't figure out what Photobucket has changed so I can't insert a photo, but here is the link. This is where the manual says it should be.

IMG_7114_zpsbc53205a.jpg Photo by Foxwoodworking | Photobucket

Thanks for any help.

Jeff

Last edited by Big ol Truck; 06-30-2013 at 03:13 PM. Reason: Better title
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Old 06-30-2013, 08:46 PM
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There is a good reason you can't find it... You don't have one. The 7.3 is throttle by wire and cruise control is handled by the PCM. My guess is your looking at a manual for a gas truck.
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Old 07-01-2013, 02:32 PM
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Well, you are right. When I go to the page 31-1 for the speed control it says gasoline.

Then I guess my short is in the wiring harness. What fun.
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Old 08-16-2013, 10:30 AM
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Check the wiring harness going into the driver side valve cover. If the harness is in contact with the valve cover it may be chafed with the insulation removed you have a short. This happened to me and the dealer could not find it but this forum helped me greatly. The fuse blowing on my 2000 7.3 was either 24 or 26 in the FB under the hood. It is a roll of the dice as to which wire shorts first causing different failures. Dick
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Old 08-18-2013, 05:58 AM
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Actually I found the problem and the reason why I couldn't find it easily.

Problem was the wiring harness that went over the front drive shaft can loose and the drive shaft wore through it.

Reason I couldn't find the problem was that the three conectors that are mounted on the left front fender well were not in the order the wiring diagram showed. So, when I unplugged the the connector that I though was the right one, it was still grounded out.

Thanks for the suggestions.

Jeff
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