07-27-2022, 04:36 PM
Welcome to the group Roc, assuming you do have a bad ground ( has not happened before as far as i know ) there is only one ground point to be concerned about, it is the battery negative ground connection right behind the starter motor on the engine, you can't miss it.
First check if it is loose and second check if it gets warm during startup, the start current is around 160 amperes and that amount of current would heat up a bad contact very noticeably.
We have found that a good indication is the green neutral light, if it dims during starting that indicates the battery voltage is not sufficient and needs to be charged or replaced or the battery connections are not making good contact, make sure there are no objects between the battery and the terminals and all the surfaces are clean.
A new battery is not guaranteed to be a good battery, there are several posts here with such a story.
Also when working on the battery always disconnect the negative first and last when re connecting to eliminate a short between chassis and battery positive because there is no current return path through the disconnected negative connection!
Another source of a bad connection is the starter relay or the connection on the back of the starter motor, follow the positive heavy cable and see if any of the bolts on the relay get warm during or shortly after a bad start.
To verify if the starter relay ( solenoid ) is good you can measure the voltage between the two studs whilst starting the engine and see if it is less than 0,3 volts when energized, it will indicate battery voltage when not energized.
Did you do a load test on the original battery and how did you test the new battery?
Hope this helps.
First check if it is loose and second check if it gets warm during startup, the start current is around 160 amperes and that amount of current would heat up a bad contact very noticeably.
We have found that a good indication is the green neutral light, if it dims during starting that indicates the battery voltage is not sufficient and needs to be charged or replaced or the battery connections are not making good contact, make sure there are no objects between the battery and the terminals and all the surfaces are clean.
A new battery is not guaranteed to be a good battery, there are several posts here with such a story.
Also when working on the battery always disconnect the negative first and last when re connecting to eliminate a short between chassis and battery positive because there is no current return path through the disconnected negative connection!
Another source of a bad connection is the starter relay or the connection on the back of the starter motor, follow the positive heavy cable and see if any of the bolts on the relay get warm during or shortly after a bad start.
To verify if the starter relay ( solenoid ) is good you can measure the voltage between the two studs whilst starting the engine and see if it is less than 0,3 volts when energized, it will indicate battery voltage when not energized.
Did you do a load test on the original battery and how did you test the new battery?
Hope this helps.