Thanks Guys!


First Picture
1: Grid / Intake heater Relay
2: Grid / Intake heater Relay
3: AC Clutch Relay (Wide Open Throttle Cut Out)
4: Starter Relay
5: Automatic Shutdown Relay



Second Picture
5: Intake temp sensor for grid heaters (Air Charge Temp Sensor, 'Niehoff' #TS81281)
6: Thermo switch for the KSB Current Dodge Part Number #5174754AA ~$70
Old Cummins Part Number #3921642
New Cummins Part Number #3408645 ~38 !



8: TPS
9: Fuel Shutoff Solenoid
10: KSB (Cold Start Advance Solenoid)
11: Oil pressure sending unit

Pics now hosted on DTR, thanks the Trebor for saving copies! WD

 

Oh and ignore the red twist connector in the first picture - the previous owner did that and I haven't fixed it yet.!

 

9. Fuel Shutoff Solenoid
10. KSB Cold start advance solenoid

 

5 or 6 is the intake air temp sensor.


Controlls when grid heaters come on.




I think.....

 

1: Intake heater relay/solenoid
2: Intake heater relay/solenoid
3: Automatic Shutdown Relay (wire colors: Dk Blu-Yel, Dk Blu, Red (to Wht fuse link), Dk Blu-Org.
4: (For A/C)Wide Open Throttle Cut Out Relay (wire colors: Dk blu-Blk, Brn (to Org fuse link), Dk Blu-Org (to SBEC pin 34) Dk Blu (to SBEC pin 9))
5: Not sure about last relay but I think it is something for the cruise control, possibly the Starter Relay though.
5 (second picture): Air Temp sensor.
6: Electronic vacuum sensor (no clue what it does, that is what my diagram says. It goes to the message center and brake warning switch and the Dk Blu wire leads to your #9 bit).
8: Fuel Heater (I think)
9: I think is the Water in Fuel sensor (digram is not showing it)
10: Electronic Fuel Shut Off (I think)
11: No clue, my guess would be another temperature sensor though.

Sorry man, I wish I could be of more help.

 

8. TPS
11. Oil pressure sending unit

 

Getting closer....

First Picture
1: Intake heater relay/solenoid
2: Intake heater relay/solenoid
3: Automatic Shutdown Relay ?
4: Wide Open Throttle Cut Out Relay (for A/C) ?
5: ?


Second Picture
5: ?
6: Air Temp sensor ?


Third Picture
8: TPS
9: Fuel Shutoff Solenoid
10: KSB Cold start advance solenoid
11: Oil pressure sending unit

 

Wannadiesel, aka FirstGenDictionary, should be here before too long to explain the rest and/or correct mistakes...

 

6 is the KSB air temperature switch. It closes below approx 65 degrees to power the KSB solenoid on the injection pump.(#10.) Its job is to boost fuel pressure and advance timing when cold, to reduce smoke and enhance idle quality. This switch is a common failure item. Check for power to the solenoid at key-on with cold engine on a cold day.

 

Anybody else?

 

From my 93 FSM-
#1 & 2- grid heater relays
#3- AC clutch relay
#4- Starter relay
#5- Automatic Shutdown Relay (what is this for?)
#6- Thermo swithch for the KSB, as mentioned by torquefan. This switch is powered by the "other" wire on the shut off solenoid. It switches on depending on intake temp, and feeds back down to the KSB.
#5(2)- Intake temp sensor for grid heaters.
#8- TPS
#9- Shut off solenoid
#10- KSB (cold start advance)

IraPatterson- the vacuum sensor switch is over on the driver's fender, right behind the hood spring.

DP

 

Good post DP.

The ASD relay (#5) supplies power to the field circuit in the alternator. The PCM regulates voltage by switching the ground rapidly.

Those 3 relays on the fender are identical, so you can swap them around for troubleshooting purposes.

 

BTW, this thread is going in the sticky under electrical - I'll call it "What are all these wires doing on my mechanical engine?"

 

In that case - I cleaned up the first post. Thanks guys for helping me figure it out.

 

Cool. The only things missing are the fuel heater and the WIF sensor.

Now we need a non-intercooled volunteer.