Horn
Postmaster
Joined: Jun 2007
Posts: 2,795
Likes: 1
From: Rogue River, OR
Originally Posted by Vinford
Bumps dont do it our roads are full of them............
How about the daytime running lights?
Does anyone know where the box is that controls them?
How about the daytime running lights?
Does anyone know where the box is that controls them?
Rog
Senior User
Joined: Jan 2007
Posts: 142
Likes: 0
From: Bama!
Yep speedo is electric. I would suspect you have a bad horn relay to fix your horn problem. Still looking over my EVT to figure out the speedo.
Possible theories...
1. Replacing the horn relay will fix the speedo too. (long shot) if the relay on the horn went bad, it might be grounding your Programmable Speedometer/Odometer (PSOM) through speed control, so no current is flowing to it. (if Odometer/trip is no longer displaying in addition to speedo not working this would support it fixing speedo too. However I do not have diagrams detailed enough in my EVT manual to get into the cicuitry of the PSOM and could not tell you for sure.)
2. Rear axle speed sensor could have gone bad. It should be the sensor on the top driver side of the differenial (if your odometer/trip is still working it would support this one or theory 3)
3. Your speedo itself died.
Always always always!!! check all connectors first for proper fit before thinking about replacing parts, and test the parts you have before replacing them.
Possible theories...
1. Replacing the horn relay will fix the speedo too. (long shot) if the relay on the horn went bad, it might be grounding your Programmable Speedometer/Odometer (PSOM) through speed control, so no current is flowing to it. (if Odometer/trip is no longer displaying in addition to speedo not working this would support it fixing speedo too. However I do not have diagrams detailed enough in my EVT manual to get into the cicuitry of the PSOM and could not tell you for sure.)
2. Rear axle speed sensor could have gone bad. It should be the sensor on the top driver side of the differenial (if your odometer/trip is still working it would support this one or theory 3)
3. Your speedo itself died.
Always always always!!! check all connectors first for proper fit before thinking about replacing parts, and test the parts you have before replacing them.
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Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
Horn relay not the problem.
Checked it as suggested.
When you take the cover off the steering wheel should there be juice in the wires that plug into the steering wheel cover?
I have none.
Checked it as suggested.
When you take the cover off the steering wheel should there be juice in the wires that plug into the steering wheel cover?
I have none.
Thread Starter
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Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
Its gone beyond the horn.......
I found a fried light switch that someone has stuck a hot jumper wire into . The plug is fried not the switch.
I found a little black box bolted just below the drivers side hood hinge.
It has a wire going from the power box on the fender into it , a ground and 3 wires coming out of it.
2 of the 3 wires coming out of it have been cut off.
Ive got some major problems here I think and need all the help I can get so if anyone has any ideas about any of it please let me know?
How hard to change the whole underdash wiring harness , has anyone done it?
Thanks
I found a fried light switch that someone has stuck a hot jumper wire into . The plug is fried not the switch.
I found a little black box bolted just below the drivers side hood hinge.
It has a wire going from the power box on the fender into it , a ground and 3 wires coming out of it.
2 of the 3 wires coming out of it have been cut off.
Ive got some major problems here I think and need all the help I can get so if anyone has any ideas about any of it please let me know?
How hard to change the whole underdash wiring harness , has anyone done it?
Thanks
Lead Driver
Joined: May 2007
Posts: 8,607
Likes: 13
From: Belair md
a whole under dash harness is going to be a ford only item but i doubt they still manufacture it, long shot but give them a call.
other then that its going to be repair yours or a junk yard unit.
if it were mine i would repair the one i have
other then that its going to be repair yours or a junk yard unit.
if it were mine i would repair the one i have
Thread Starter
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Cargo Master
Joined: Aug 2004
Posts: 3,455
Likes: 8
From: Williams Lake B.C.
Im bidding on a harness on Ebay.
It says its for a 95-01 I hope 94 is the same. Its a long shot but Ill try and get it bought as the trucks a great truck and Id like to fix it right!
It says its for a 95-01 I hope 94 is the same. Its a long shot but Ill try and get it bought as the trucks a great truck and Id like to fix it right!