Mystery wire.
So this leaves the unattached mystery wire with the straight connector. There doesn't appear to be any more unattached sending units on the engine remaining. The oil pressure guage needle responds so I assume its plugged in in the rear of the engine in the vicinity of the glow...
The individual glowplug wire/connectors are too short in length to be mis-plugged elsewhere but onto their respective glowplug. However you guessed right, almost. The boneheads who replaced the glow plug controller and harness did in fact put the Engine Warn Lamp "elbow" connector onto the...
I was beginning to think that was the case, but you cut straight to the chase. :hail
The bonehead shop that installed my glow plug harness incorrectly were clueless. :shoot:
My only question now is what is the procedure to test the coolant temp gauge and engine warn lamp circuits? :confused:
The wire has a round pin connector for mating to a socket. There is another wire with a 90 degree elbow that is the Coolant Temp Sending Unit wire (temp guage). I'm seeking the Engine Temp Warning Lamp wire
Hmmm, Maybe there was a 90 degree elbow (that fell off) Engine Temp Warning Lamp wire...
Perhaps someone on this forum has the knowledge to trigger the Engine Temp Warning lamp on their '88 7.3L to flash so that I may duplicate the procedure on this mystery wire I refered to and determine if this wire is THE warning lamp signal wire. :confused:
This problem I had was prior to an engine rebuild, so there's a possibility that new gaskets and seals took care of the low oil PSI problem. I just haven't put the truck under those conditions after the rebuild. These days (post rebuild), driving the frigid upper midwest, my highway PSI is 40+...
There was a time when I was either:
1. Running my 7.3L over the Continental Divide when I noticed that if I didn't keep the engine revs above a certain RPM, my oil pressure guage (aftermarket) indicates close to zero PSI and the idiot light would lit up.
2. Blowing through Las Vegas on the...
The engine's been off for about an hour (engine now dead cold) and the needle sits now in the normal range. Turning the ignition on (just now) and firing the engine, the needle goes back down to "C". Was this just the engine's "heat soak" causing the needle towards "H" after shutting down a...
My dashboard panel coolant temperature needle indicator (original equipment) slowly rises nearly all the way to the "H" after I shut off the ignition at the end of the day. The needle swings back to the middle of the normal range if I immediately turn the key to accessory or restart the...
My '88 7.3L has an unconnected Engine Temperature Warning Lamp connector and I'm not sure if a loose wire I found in the engine bay is part of this circuit. How do I trace the circuit back to the instrument panel for this warning lamp?
What truly sucks is that the online cross ref from wix and hastings require actual make and model info in their search box and that doesn't register. I need to go by thread diam and seal dimensions.
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