mack31 Posted October 15, 2023 Share Posted October 15, 2023 (edited) Trying to get our 1930 BC running. It was cranking earlier but now we have nothing at all not even a click. I just replaced the battery today with a heavy duty because the old battery was done. It is a 12volt negative ground system. Could it be the ignition coil? Edited October 15, 2023 by mack31 Quote Link to comment https://www.bigmacktrucks.com/topic/73427-new-battery-won%E2%80%99t-crank/ Share on other sites More sharing options...
Brocky Posted October 15, 2023 Share Posted October 15, 2023 Sound more like a loose or broken wire between the starter switch and the starter solenoid???? Quote Brocky Link to comment https://www.bigmacktrucks.com/topic/73427-new-battery-won%E2%80%99t-crank/#findComment-540369 Share on other sites More sharing options...
mack31 Posted October 16, 2023 Author Share Posted October 16, 2023 38 minutes ago, Brocky said: Sound more like a loose or broken wire between the starter switch and the starter solenoid???? Ok I will trace that. Thank you We have a distributor and magneto as well as a generator. Not sure if this has anything to do with it. We are trying to learn and research but coming up with little info Quote Link to comment https://www.bigmacktrucks.com/topic/73427-new-battery-won%E2%80%99t-crank/#findComment-540376 Share on other sites More sharing options...
D-Day Posted October 16, 2023 Share Posted October 16, 2023 Also Check the ground connections between the battery and frame also coming off the engine the point where the wire end connector is crimped on to the wire as well a little corrosion between the wire and end connector hard to see but problematic Quote Link to comment https://www.bigmacktrucks.com/topic/73427-new-battery-won%E2%80%99t-crank/#findComment-540377 Share on other sites More sharing options...
Brocky Posted October 16, 2023 Share Posted October 16, 2023 As D-Day said check all your wire connections from the battery to the starter and the small wires that lead to the ignition switch and starter switch and back to the engagement solenoid on the starter.. With not even a click means a loose or broken wire somewhere??? Quote Brocky Link to comment https://www.bigmacktrucks.com/topic/73427-new-battery-won%E2%80%99t-crank/#findComment-540380 Share on other sites More sharing options...
mattb73lt Posted October 16, 2023 Share Posted October 16, 2023 I could be way off here, so please disregard if so. I was under the assumption that early Mack’s were of the 6 volt variety. This comes from fire trucks I’ve worked on. The earliest being a 1934 BG. If so, 6 volt parts don’t always do well getting 12. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/73427-new-battery-won%E2%80%99t-crank/#findComment-540410 Share on other sites More sharing options...
Popular Post tjc transport Posted October 16, 2023 Popular Post Share Posted October 16, 2023 not only was that truck built with a 6 volt system, it was also positive ground too. so if it is now 12 volt negative ground, someone fiddled with the electrical system. 4 Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/73427-new-battery-won%E2%80%99t-crank/#findComment-540430 Share on other sites More sharing options...
mowerman Posted October 23, 2023 Share Posted October 23, 2023 Maybe the new battery is completely dead good luck Quote Link to comment https://www.bigmacktrucks.com/topic/73427-new-battery-won%E2%80%99t-crank/#findComment-540848 Share on other sites More sharing options...
Freightrain Posted October 23, 2023 Share Posted October 23, 2023 Time to bypass everything and use jumper cables from a battery to the starter. That would eliminate all connections. Sounds like starter is cooked if all you did was replace the battery. Is it supposed to be 6 volt? Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/73427-new-battery-won%E2%80%99t-crank/#findComment-540873 Share on other sites More sharing options...
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