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I am a new owner of a 1991 tripple e regency with an 7.3 engine. Its a rare car in Germany.
On first weekend travel I got problems. Suddenly she rides only in second gear. So went home 300 miles with 20 mph.
Before opening the gearbox I checked the electric system.
Only I found, the Overdrive switch is broken in two parts. It seems very empty. Is inside rarely only one moment switch, a 12V-bulb and a yellow LED?
And is anywhere deposited he complete wiring diagram of an 1991 Econoline E-350 with 7.3 diesel engine and overdrive? Ford Germany don't support the gray imported cars.
Sorry about my English
Steiger from Gelsenkirchen, the town of Schalke 04
THX
At weekend I will check the connectors, all solenoids and switches again.
I hope I will not open the gearbox for clutches or brake band.
A second Question. In my old (burned down after 720.000 km) VW T3 Vanagon I used a cheap voltmeter and a simple resistant to watch the engine rpm.
Is in the electronics a pin for a engine tachometer. That's nicer than an bicycle tachometer and a magnet on v-belt disc.
Many times the small wires from the switch will break under the top steering Column Cover ... remove those covers and you will see the small wires where they come out of the Shift lever .... you do Not need to remove the steering wheel.
your Tach Signal comes from the sensor that is mounted on the top Timing Cover near where you put the oil into the engine.
Pin #36 on the PCM is where a Tach signal is connected for the OEM style Tachometer you will have to look to see if that wire is used on your vehicle IF you do not have a Factory Tach.