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Checking the Pressure Switch:
If your motor is not running and you’ve checked the following: for loose wiring
connections, fuse, the switch on the lead wire was
“ON” and made sure you were connected to a fully charged battery and every-
thing is fine, but the motor won’t run, then it’s time to check to see if the pres-
sure switch is bad.
Remove the cover off the 1” square box (pressure switch) on the head of
the pump, the cover is held on by one phillips-head screw. This will ex-
pose the two red wires.
With the pump connected to a good 12 volt power source and everything
on.
Slip the two red wires off the terminals and touch them together.
If the motor runs, it means the pressure switch is bad and needs to be replaced.
If it still doesn’t run, try bypassing the switch in the lead wire or using another lead wire. Even if a tester shows power to the pressure switch, it still
could be the switch in the wire that is causing the problem.
If still not responsive, use a voltmeter or electrical tester to make sure you are getting power to the head of the pump, as it could possibly be something
in one of the wires or even the lead wire assembly may need to be replaced.
Warning:
It is NOT recommended to run the pump this way, as the pump will continue to run and not shut off.
This could result in blown hoses when all discharges are closed. Also, this could result in premature failure of the pump completely.
Motor runs, but no pressure:
CHECK:
Both the counterweight and the bearing need to spin freely and both need to
spin INDEPENDENTLY of each other. If these 2 pieces are ‘stuck’ together,
you will need to break them free and whether or not they are sticking, spray
some good quality lubricant or something similar on them and let it soak in and
this should restore most of you prime.
