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Hey guys, Got a real thinker here for you. We're trying to turn the motor over in a 1964 Mack B-61 through the series parallel switch, but without the ignition switch. We have all the batteries tied together with the series parallel switch and starter, but don't know which two terminals to cross in order to get the motor to turn over so we can build up some oil pressure for a prestart. There are three small terminals located on the rear of the switch (see pictures). We established that the one with the red wire is a ground leading to the frame, so we did that. Then that same terminal is connected to the bottom terminal with a jumper wire. We put a voltage meter on the them and read that each one has 12.5 volts when it's set up the way I just described. However, when the jumper wire is disconnected, only the terminal with the ground wire reads 12.5 volts and the others have 0. My question to you is what terminals must I cross in order to complete the circuit and turn the motor over. Let me know, CJ
I'm a Mobile Mechanics helper , And A guy came up to me yesterday to look at his 02 Freedom Cab over Renault Powered Box truck , Story I was told Goes like this ! ,. Diesel was stolen from tank , They tried to start it after fueling up , drained the batterys , Replaced the Batterys , Now It will not start .. I tried the normal Troubleshooting methods , Checked fuses , Relays , Check all grounds and Battery terminals and cleaned , I used a push button switch on the starter and Got it to fire over , I Get Nothing from the ignition switch ?? , I checked the wires coming from switch for power with the switch on , and in the crank Posistion , Very Stumped over this issue , Normally I can figure it out and have it back going , But , something I did notice after cleaning the Terminals was the Anti-Theft light on the dash would go off after replacing the terminals ,, Is there an Interia switch somewhere for the anti theft , or Is it something that will have to be done by a Mack Service Dept ?, I'm just trying to figure out the issue and get paid for what I have done so far , but I'm not the type to give up on something and not get paid for working on it all day ,, I also checked to see If I was getting fuel at the injectors and I am getting good pressure ,, But I hear nothing turning on or even clicking from using the ignition switch .. If someone has some Info ,,, PLEASE feel free to throw it my way regarding this issue , I will be going back tomorrow to try and get it fixed , but would like some help tonight if possible ! , Thanks All M-M ! .