Quote:
Originally Posted by 010175
1998 suburban, owned it for 15 years, 220,000 miles, new battery, starter last year, cleaned connections by disassembling all parts at battery! The bolt out, the round lead thick washer out, ect. The problem is when I turn the key at times it acts like a dead battery. Jump starting works all the time. If I go from off to start with the key sometimes it will not turn the starter. If i go from off to on, wait 20 sec, then start, it will start. Is there a starter relay somewhere not on the starter that is going bad? What is the chance it the ignition switch? I know its not the battery or the connections at the battery! Any other ideas would be help full.
Dave
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I would load test the battery , since a jump start stops any cranking issues.
at this amount of mileage replacing the ignition switch and the crank starter relay is a good idea .
any corroded wires should be replaced. the corrosion can work into the connector fittings reducing amps required to drive the starter.
the other Item would be the alternator output should be checked under full load. it is possible its only putting out 50% power as the diodes start to fail. also on shutdown will suck down the battery power [leakage of current].