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Yea I think they may have done away with TB1, and just spliced the harnesses as necessary when they upgraded the relay panel. It is hard to tell on the early A1 trucks, as I have found no specific wiring diagram for them. TB1 is under a cover to the left on the A0 panel and there is no place...

Yea pre s/n 18550, it is basically an A0 with a 3126 and a circuit board power dist panel… Guess they had to use up all the A0 parts before they could go into full A1 production:) Does it have LED’s on the alternator regulator? At any rate the turn signals and reverse lighting are all wired...

One thing that could make those guide pins and notches make noise is slop in the upper latch plate, that combined with un-even loading from a bad or sloppy air shock assembly could cause the movement/noise…. Was taking some cab weight measurements for one of my hair-brained ideas and noticed...

The door rods are a smaller than usual diameter. Bend some new rods out of stock that matches the diameter of the off the shelf clips. When I got my toyota handles out of the junk yard, I pulled a bunch of rods and clips at the same time to make new rods(Yard operator gave them to me:)) They...

No, not the back of the power panel, there should be some plugs below the dash, behind the kick panel… You are actually looking for J210 though(P210’s partner:)). Just had eyes on mine today, it is currently tucked in behind the CTIS manifold, but I may have pushed it and another connector...

Well it may be a sub harness that runs alongside the main harness, like they did for the M1079 box harness. Look under your passenger dash for and see if anything is plugged into P210…

What was the problem?

Works good, except for me leaving its vent uncovered and saturating the oil with water:). Just relocated it back behind the fuel tank so I can start cutting huck bolts to remove the mid structure, and changed the emulsified oil… I did not use the flow control device I discussed earlier and...

CB70 feeds the main light switch. The switch uses power from CB70 to power K7 which is the headlight relay. So first question, does the LED for K7 light when you turn on the light switch to service drive? If not, I would look back thru the switch or the CB70 supply. You can measure the...

Sounds like it was probably an air leak… at any rate, good houses have good foundations, and baseline fuel pressure is your diesel foundation…

The control power/24v ign relay, is powered by 12V from CB 70 via the ign sw. If the converter is providing all the truck 12v, and drops out while cranking, so will that relay, removing trans power and start circuit power, which will interrupt the crank…

The only problem with the 12/24 alt setup is when you draw 12V out of the middle of it. The alt regulator acts as a balancer working to deliver 1/2 of the 24V output to the 12V output. IE: 14.2/28.4 I tried running my alt without the 12V years ago and it did not appear to work(alt would not...

Batteries are ultimately loads. any power you take out must be put back on top of powering operational loads. Are you planning on running for very long periods of time with the engine off? If not, then a large battery bank makes no sense. If you are, then the stock 100A alternator 12/24...

There are internal shocks in the air bags that should keep things mostly inline either inflated or deflated, and limit overall travel. Mine works fine inflated or deflated, so I would say you have a deeper problem, or they are not installed correctly. The shock is attached into its base...

Well you wont have to drain the oil:) The filter boss is bolted to the cover which is a machined casting. The outer flange of the oil cooler is sandwiched between the cover and the block, so there is an inner and an outer gasket. The inner gasket seals between plate and block, so mostly...

There are also exploded views in the 24p manual found here in the TM section…

That is the oil cooler assembly…. It is hopefully leaking where the oil filter boss is bolted to it. leaking someplace else would be bad as I believe the cooler is one piece/sealed... It is a flat plate cooler and the cavity it sets into has water pump output flowing past on its way into the...

Yea you can temporarily connect up a test lamp sampling the flasher output to see if it remains constant. If it does then the problem most likley lies in the column switch…

Everything that feeds the flasher goes thru the hazard switch, make sure those connections are good…

I think that WAS the tip… And I agree with it…:)