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90% of the time its the harness or the starter. I replaced the bad harness on my car to discover my starter is bad as well. occasionally the engine to body ground or body to battery ground can have some resistance.
90% of the time its the harness or the starter. I replaced the bad harness on my car to discover my starter is bad as well. occasionally the engine to body ground or body to battery ground can have some resistance.
Mark
Thanks Mark.
Having load tested the battery at 320A (1/2 the CCA of the battery) and it held a steady 10.67V, so it can only be the wiring and/or the starter.
I am going to run a load test again at the connection at the transmission and then measure ALL voltage drops, from the battery to that connection and then both ground straps (battery and engine). Cable #14 is new.
90% of the time its the harness or the starter. I replaced the bad harness on my car to discover my starter is bad as well.
Mark
If it cranks slowly during hot starts, I would agree seeing that only the starter and harness at the starter are subject to heat in the engine compartment.
It ended up being the starter. A new Bosch unit was installed.
I disassembled the old starter and I can see why it ended up being the problem. I'll take pics and then clean all the bits up before installing a new brush plate and cleaning up the commutator. The planetary gear set was totally dry as well.
The faulty starter is original (date code 05-05) and the 997 has a mere 148,470 kms (92,254 miles) on it.
In many cases a replacement starter may not be necessary.
All that the original starter needed was a cleaning and possible replacement of the brush plate.
As removed, the segments in the armature are dirty. The brushes were just as gummed up due to a film of grease and carbon dust from the brushes. The grease was likely from the planetary gear drive that was dry upon disassembly.
Same for the motor housing. A film of grease and carbon from the brushes over time.
All cleaned up and ready for a new brush plate assembly...
Other than the brush plate assembly and cast nose housing not shown, all the bits in a 997 starter...