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Oops, I should have said the fan solenoid is all the way to the RIGHT under the dash...

I would add that it is for wet cells. Unless your batts have caps to fill/check electrolyte, it is useless:)

what NDT said. Solenoid is on to apply air and freewheel fan. Temp switch removes power when it hits 205F. Solenoid de-energizes and vents fan side to engage fan. You should hear this venting from under the passenger dash every time you turn off the truck...

since you have documented them you can clear the codes in memory and see if there are any hard/current faults. The display showing (Mode On) while a D memory position is being displayed indicates a current active fault...

The A0 schematic has both the WTEC II and III drawn into in. They shifted to the III in late 98, so there is a relay location for it on the main panel, bu tif yours is a II, it uses the in the VIM box under the passenger dash. That is where the fan control solenoid valve is located, mounted...

What Third said! CB73(reverse) and CB74(turn/hazard flasher) both get their power from the main light switch...

They didn’t... The reverse contacts in the VIM go only to that single backup light. I don’t see any reverse feed to the 12V or 24V(7pin or 10 pin) inter-vehicle connectors... Guess the mil isn’t big on backing up:) if you want one you will have to cobble it together yourself...

96 makes it an A0, as mentioned every tm has the electrical drawings all the way in the back just in front of the change forms. The reverse contacts/relay are in the vehicle interface module(VIM) under the dash. Power comes from CB73 thru the VIM reverse contacts thru P51 under the dash, then...

The big connections on each end are coolant... could be the trans connections in the middle, loose or with a bad seal. Once the trans fluid warms up it is able to squirt a little out. I notice a little all the way up on the housing under the crankshaft. Unless you have a lot of airflow...

If you are keeping the original manifold, you don’t need anything, in fact you only need a single acting pump with a pressure relief, a check valve and a return port to replace the AOP. Now if you are getting rid of the manifold valve you will need a valve assembly or combination of valves to...

it won’t cause the hydraulic system to pressurize. There is a safety valve built into the brake system that disconnects the air used for the air operated hydraulic pump when you apply park air/release the park brakes. as mentioned you want the lower right button in and locked for cab...

I think the issue he is talking about is residual heat from the bottom of the rad possibly adding heat to the trans oil. If the engine is 200F then the trans is 200F as the aux fans don’t kick on until the main fan does at 205F. I guess another way around this would be to put the aux fans on...

Oh, and ericks military has the current version(12-24V) listed for $45...

It is under the passenger dash. Metal case about 4X3X2 with a 3 pin cannon plug on it. I have seen them on Ebay, I am going to retrofit a 3 wire solid state truck flasher that is a little more available, Made by pedersen if I recall. Was going to take a run at fixing mine, but they potted...

Yea, thats the trans cooler. Could be it, could also be oil from the oil pan or timing case cover above it... you said it was clear though, which would probably indicate trans oil as the engine oil goes dark/black very quickly in service.

Nice looking truck! You can use AW-32 in the cab hydraulics as well. If the truck has military oils in it, then it most likely has the same 15W40 in the trans as is in the engine...

The steering and hydraulic system(did you get a winch truck?) will use AW-32. you could run 46 in it at higher temps if you really planned to work it hard. The winch system would be intermittent use and unless you are really wheeling and working the steering system hard, so would the steering...

The start circuit is in 4 parts. 1. The trans controller/neutral start contacts provide 24V to the start relay K1. 2. The pushbutton provides a path to ground thru the starter lockout relay K24(starter lockout keeps you from cranking a running engine) To energize the start relay K1 When the...

And that was a deal!

1 of the valves is located under the drivers dash where the pressure gauge sensors are located. One is at the service tanks and it feeds a small line over to supply air to the valve that controls the cab lift hydraulic pump. The third is I believe back on the crossmember over the rear...