3406B coolant temp sensor location

I don’t think it has an overide switch, but I might be wrong.
This is gonna make y’all grin. I got a leaking steer wheel seal, front drive line out put seal and real drive in put seal a leaking. Engine fan isn’t coming on automatically. Can’t seem to get the jakes to work and old baw I bought it off of says, “I’ve had to fiddle with the hand throttle several times to get it to work”, amp gauge and dash lights. Dang, I know it!! You baws hang with me please. This da gone thread might outlast ol’ Biden.

 

I seen the solenoid on the firewall, it looks to have one hot wire and a ground that goes directly to firewall.

 

I’m going to Peterbilt today and see about a wiring schematic. I guess this gas filled coolant sensor and gauge combination are bad. There’s really nothing electronic about it aside from the light in the gauge? I’ll probably pick up another cab power relay.

 

Since I have some intermittent things not getting power in the cab, is the cab power relay responsible for ALL dash functions and dash lights?

 

Got another relay that goes behind the left dash panel. Installed but no change in amp gauge or dash lights. It was so darn cold, with the truck sitting out, I didn’t try starting it. With one wire(+) coming from the alternator, I assume it’s going down the battery post on the start the starter solenoid, with voltage read from that area?

 

As far as relation, engine(4mg 3406B), is not the original engine. The guy at Pete said and I forget, that the truck had an earlier model 3406B. I guess it doesn’t matter which style of coolant temp sensor I go with, just as long as I go with the complete set up. He did tell me and I think you guys pointed this out already for the other style gauge, “Don’t get this temp sensor from International. They require a different OHM and won’t work”. Of course that’s if I go with the electric gauge.