Check engine light

[Smittyagain]

Not showing on dash

 

[RonD]

Welcome to TRS

CEL comes on when computer is powering up

Does engine start?
If so computer is powering up so CEL has a burned out bulb

CEL bulb gets 12volts with key on, the computer then GROUNDS it to make it light up

 

[Smittyagain]

Computer not powering up I guess. Turns over, seat belt light comes on, but none of those lower bulbs. Don’t hear fuel load sound.

 

[rusty ol ranger]

Computer not powering up I guess. Turns over, seat belt light comes on, but none of those lower bulbs. Don’t hear fuel load sound.

Might be the EEC relay/connector

 

[RonD]

+1 ^^^

Drawing here of 2.9l engine bay: https://www.2carpros.com/forum/automotive_pictures/266999_fuel_5.jpg

The EEC relay should have a Brown base/plug in
Fuel pump relay a Green base

Unplug EEC relay and check for corrosion on the tabs and slots
If you have a volt meter or test light check each slot for 12volt, key OFF
If you find a 12v slot fuse/fusible link is OK, remember that slot
Now turn key ON
Re-test slots, there should now be another slot with 12volts, that's from ignition switch in the cab, it activates relay to power up computer(EEC)


Do wipers work, turn signals, Fan/blower with key on, just seeing if ignition switch is working to power up interior fuse box

 

[Smittyagain]

Wipers, fan, signals work. Took prayer to get the base unplugged!..yes, corrosion. Update coming!

 

[Smittyagain]

+1 ^^^

Drawing here of 2.9l engine bay: https://www.2carpros.com/forum/automotive_pictures/266999_fuel_5.jpg

The EEC relay should have a Brown base/plug in
Fuel pump relay a Green base

Unplug EEC relay and check for corrosion on the tabs and slots
If you have a volt meter or test light check each slot for 12volt, key OFF
If you find a 12v slot fuse/fusible link is OK, remember that slot
Now turn key ON
Re-test slots, there should now be another slot with 12volts, that's from ignition switch in the cab, it activates relay to power up computer(EEC)


Do wipers work, turn signals, Fan/blower with key on, just seeing if ignition switch is working to power up interior fuse box

yes, wipers, fan, signals work. Corrosion for sure. Will update, but what is the black base for?

 

[Smittyagain]

Didn’t have another 12V show with key on in the fuel pump relay. I will look how to check on the new fusible links installed.

 

[RonD]

The black base is for Air Conditioning Compressor clutch relay, called the WOT Relay

EEC Relay powers the FP Relay, so EEC relay needs to be working for FP relay to have key ON 12volts

But FP relay should have key OFF 12v just like EEC relay does, but from a different fuse/fusible link