shift on the fly Relay location - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 04-01-2007, 09:46 PM   #1 (permalink)
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shift on the fly Relay location

I am looking for the switch on the fly relay as my truck wont shift into 4X4 and the light wont come on.There appears to be no vac leaks at this time but I would like to start to eliminate. I cant find the fuse/ which box is it and witch number is the relay? I show it as #41 & 42 but which panel? Please help need to use it tomorrow.
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Old 04-01-2007, 10:30 PM   #2 (permalink)
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Re: shift on the fly Relay location

Your ESOF relays should be right in front of the Fuse box under the hood, in a separate box. It will look like the black box behind the fuse holders in this PHOTO, because that's where it came from (wrecking yard).

The fuses would be #17 (30 amp) under the hood (provides power to relays and motor), #28 (10 amp) under the dash (powers the hub lock solenoid), and #19 (10 amp) under the dash (power for the indicator lights.

Hope that helps
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Old 04-01-2007, 11:12 PM   #3 (permalink)
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Re: shift on the fly Relay location

THANK YOU
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f-350 2001 7.3 superduty 268000 km
DP chip with F5 switch and tymar intake
4" exhaust with cat delete and Pilar mount gauges
True cool tranny cooler 44'000
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