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Your Welcome And no it’s not...:)

Correct, you also won’t get a oil or stop light if you should loose oil pressure:)

Ok, I think I understand now. I thought you still had a starting problem. your oil pressure switch is shorted, it should open to turn off the oil and stop lights Once the engine starts. That would also keep your alternator from charging... should be able to get one at about any autoparts...

Ok, wait, lets backtrack a little. With the white wires connected to the pressure switch, you are getting oil and stop lights when you turn on the main switch? If you do, then the oil pressure switch is completing a circuit to ground like it should with an engine that is not running/below...

Ok, well you have oil pressure, put a jumper wire on that black to white wire and the truck should start normally, then remove the jumper and the oil and stop lights should go out and the alternator should come online. You are looking for 14.1 and 28.2V at the batteries... Then take it out and...

What was the engine temp when you took that video? The black and white wire go to the oil pressure switch. It opens when the pressure goes above 15PSI. When you turn on the main switch, it powers the oil and stop light in the dash, the starter inhibit relay K19 and the alternator excite relay...

No, you just had a bad NS relay. Two of the relays(NS and SF-03) are supposed to be 12V, so you need to get a pair of 12V relays from your local auto parts store and replace them. The reason why this is important is that the dropout voltage on a 24V relay is not very far below the normal 12V...

No, the oil pressure switch won’t keep it from starting unless it is open(the condition it is supposed to be in when it goes above 15PSI), in which case neither the oil nor stop light would be lit. It being shorted when the engine is not above 15 PSI provides a path to ground to energize those...

Thats a good one. The TL list in the A0 schematic ends at TL320... the A1 does have TL’s up into the 500’s, but I have only noticed them on the schematics I have, and have not seen a 501 or 502 specifically... things that make you go Hmmm... You may have to trace them by hand...

I think it would, the engine will be happier being able to reach and maintain its designed operating temp reliably. I am going to do it when I install my block heater. You don’t need another thermostat housing. It appears they extended the casting on the normal one into an elbow, so you simply...

They actually show that restrictor in the 24P manual. Even in place it will still move more heat than the engine can make down to the cooler and out to the trans. They did actually completely fix this issue... They did away with that bypass pipe entirely on the A1 and A1R and left the engine...

Your valve looks good, it may still be leaking though. You need to put pressure in on it’s inlet, cap the outlet then close the control solenoid and see if it is leaking Anywhere. If you are hearing air under the truck, You also need to feed air down toward the rest of the CTIS system and...

On a A0 with a 3116 Engine, not warming up is not unusual. They diverted all the bypass coolant down to the transmission cooler, so you have to warm up the transmission before the engine can warm up...

one weird thing? You got all kinds of weird things going on. the air gauges on the left are brake pressure. The rear is main and the front is secondary brake system pressure. All the gauges get fed 24V from CB77. In the case of the air brake gauges, the 24v passthru them down to the air...

Do you have oil pressure above 15 PSI on the gauge? If so you probably have a bad/shorted oil pressure switch...

What Geo said, the transfer case and trans use same oil so if trans oil is o k, somis the trans case. the oil light in the dash is driven by the 15 PSI oil pressure switch which is located by the oil pressure gauge sender down on the left side of the engine block. if the light isn’t going...

Don’t know which vim relay specifically but you can probably figure it out. I would start with pulling connector PX33 on the VIM and seeing if you have 24v on pin F1 Of the vehicle side connector. That comes from CB21 via TB1 pin 34. since the VIM relays are the same as the other relays, you...

the start button provides a pathway to ground When pushed. That ground path passes thru the start lockout relay K24’s energized contacts. K24 energizes when the main switch is turned on and de-energizes when oil pressure goes over 15PSI To keep you from cranking a running engine. the ground...

If you havn’t had any brake issues, your 2way check valves must be in good shape...

I don’t think that cover is vented, if vented, it would have a hole in the middle of the domed part of the cover, which is clearly visible, and it doesn’t...