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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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On a 1981 Ford E350 7.5 L cutaway, there is a 4 amp drain on

Customer Question

On a 1981 Ford E350 7.5 L cutaway, there is a 4 amp drain on the battery when parked and everything turned off. I removed all the fusses and trouble still there. Replaced the starter solenoid and no change. Could the voltage regulator cause the problem?
With a 4 amp drain it means 3 ohms of resistance, the same as most solenoid coils.
Submitted: 2 years ago.
Category: Ford
Customer: replied 2 years ago.
This is a motorhome so there is a battery isolator module in the engine compartment.
Expert:  fordtechsuzukitech25 replied 2 years ago.
voltage regulator could cause the drain, alternator also