So this bus died on the road and with the door open the red flashing lights come on.It won't crank. replaced all the grounds and batteries also replaced the relay. wait a few hours and restarts and quits 20 minutes later. Now it won't crank at all and the red warning lights still come on with door open. any help would be great.
We had a 2007 that the positive cables messed up where the fuse links are, replaced all the positive cables. If I remember correct it had a low voltage indicator as well as the lights.
OK!!! found it. 3 wire connector by starter for ECM/ECU feed wire. Center one!! looked fine when pulled apart but connector to wire inside was corroded.Thanks for the reply
9 school buses.3 service vehicles.4 Tractors and Me.