1992 F-250 XLT, extended cab, rwd, 7.3IDI with E40D blues. I recently purchased this truck from Oregon with 103k. Seller was less than honest about condition. However it is a Beautiful truck, well worth bringing up to speed, excellent condition, except....
1) Low voltage. Solved. Found that someone had replaced the 1G alternator and over torqued the B+ post and partially shorting out internally. 5 year old batteries. Replaced with same for now, 3G conversion later.
2) Glow plug relay clicking. Solved. Found after market glow plugs had incorrect resistance. Replaced with OEM. After market relay module improperly wired. Replaced with OEM.
3) Trans in limp mode, OD light on dim, no tach. Unsolved. This is what I have eliminated thus far:
A) PSOM temporarily replaced with a used unit from my ‘93. Good.
B) Trouble shooting TPS, MAP, TECA(TCM), Relays etc... found .39 volts
supply. Manually jumpered relay and 5 volts. System seems functional
at this time with jumper. All fuses and relays check good.
C) Full power and grounds throughout so far. Relay has full power and
ground but signal to relay with key on engine off is .8volts.
This truck has the newer relay/fuse box with lid and 5 relays. Also noted is Ford reman transmission and TECA. Not sure where to look from here. I believe that there is insufficient power coming from the ignition on.
Question- Does the power signal to the relay simply come from the ignition switch?
There are other. I believe non related issues I’m plowing through such as:
1) Hard power steering.
2) Small leak in radiator.
3) Drivers side window regulator.
4) A couple of injectors dropping out at idle.
5) Turn signals going into AFIB.
6) Touchy brakes(if you hit the pedal more than easy the truck will stop so fast
the paint might fly off).
1) Low voltage. Solved. Found that someone had replaced the 1G alternator and over torqued the B+ post and partially shorting out internally. 5 year old batteries. Replaced with same for now, 3G conversion later.
2) Glow plug relay clicking. Solved. Found after market glow plugs had incorrect resistance. Replaced with OEM. After market relay module improperly wired. Replaced with OEM.
3) Trans in limp mode, OD light on dim, no tach. Unsolved. This is what I have eliminated thus far:
A) PSOM temporarily replaced with a used unit from my ‘93. Good.
B) Trouble shooting TPS, MAP, TECA(TCM), Relays etc... found .39 volts
supply. Manually jumpered relay and 5 volts. System seems functional
at this time with jumper. All fuses and relays check good.
C) Full power and grounds throughout so far. Relay has full power and
ground but signal to relay with key on engine off is .8volts.
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This truck has the newer relay/fuse box with lid and 5 relays. Also noted is Ford reman transmission and TECA. Not sure where to look from here. I believe that there is insufficient power coming from the ignition on.
Question- Does the power signal to the relay simply come from the ignition switch?
There are other. I believe non related issues I’m plowing through such as:
1) Hard power steering.
2) Small leak in radiator.
3) Drivers side window regulator.
4) A couple of injectors dropping out at idle.
5) Turn signals going into AFIB.
6) Touchy brakes(if you hit the pedal more than easy the truck will stop so fast
the paint might fly off).