06 Ranger 2.3 manual. Turns over no start. Intermittent problem. Replaced inertia switch. Replaced relay in fuse box. Amp draw measured at inertia switch is 6.5 to 6.9? No check engine light but I got P023 Fuel pump secondary circuit low and another fuel pump secondary circuit high before I replaced the relay? What’s the normal amp draw for the pump? Hasn’t left me sit since I replaced the relay but I haven’t driven it that much?

 

Welcome to the forum

At startup it can go as high as 10-12amps, but yes it should run 6 to 8 amps

It uses a 20amp or 30amp fuse usually, but that's for the wire size and distance, always, fuse is not for the device, its there to keep wires from melting and starting a fire if there is a short

 

Thanks. Hopefully it was just the relay causing the problem. Guess I’ll keep my meter in the truck in case it happens again!

 

Probably was, secondary circuit is the 12v power being sent to fuel pump

Primary circuit is the 12v being sent to the coil in the fuel pump relay used to close it

Fuel pump relay issue in not common, although many are replaced, lol

But with a Secondary power code coming up, relay would be most likely issue