Voltage at inertia switch f150 2003

Asked by GuruXGZF3 Nov 29, 2018 at 05:04 PM about the 2003 Ford F-150 XLT Crew Cab 4WD SB

Question type: Maintenance & Repair

Having fuel issues erratic got checking voltage at inertia switch. Key turned
on 13 volts and then drops to 7.5 volts also pulled fuel relay and still have 7.5
volts at inertia switch. This is with the switch unplugged

1 Answer
1,810

stevieray4 answered 5 years ago

That is normal.You will only see battery voltage at the switch for a split second or 2,reason being when key is turned on,the fuel pump primes then after 2 seconds it cuts off.

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