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J, Thanks for the reply, yeah, that is the next step on sunday. I am having the battery switch tested today and get it back tommorrow. If it is ok then I go to the switch the fuel cutout and jump. Rich

Back at Problem Ok, so I finally got at the truck on this problem. I have 24volts from Bty to the starter, and then up wire (#81) to the back of the Battery switch on the dash. but then no voltage from switch via wire from back of Bty switch to the Starter switch. Which tell me it is the Bty...

more...is more... The investigation continues..ok..batteries are charged...they are deep cycle Catipillar HD 's 12v, each reads 14 volts...all wires are correct and tight at all connections are clean....turn the battery switch on, and no dash lights, or head lights, (even when with a charger...

Thanks I went back out and have been looking it over..seems that the wiring to the preheater switch may be wired up wrong. additionally now that the batterys have been run down I got them on a slow 12v charge, separately. I also looking to just putting in new batterys (4) and seeing what...

Ok,, so we had a few days of cold weax up here in the northeast. Been starting up the 818 every day just to run her... Temp got down into the 20's and I had to use the preheater... after following the proceedures on the dash plate it would not start...but when I looked at the batterys (2...