Cub Cadet MTD P90 Series User Manual

Page 51

UEL

YSTEM

AND

OVERNOR

With the ignition key in the “on” position, test for volt-
age at the power lead connection. See Figure 4.21.

• If battery voltage is present, bench test the sole-

noid.

• If the voltage at the connection is not the same as

the battery voltage or there is no voltage, the prob-
lem is with the equipment’s electrical system and
not the solenoid. Follow the troubleshoot proce-
dures found in the appropriate service manual for
that piece of equipment.

Bench testing the solenoid

To bench test the solenoid:

1. Remove the afterfire solenoid by following the proce-

dures described in the afterfire solenoid section of
this chapter.

Connect the ground lead of the solenoid to the nega-
tive side of a 12 volt power supply

NOTE: A battery charger set to the trickle charge (2 amp)

setting works fine for this test.

Connect the power lead of the solenoid to the posi-
tive side of the power source while watching the sole-
noid’s plunger.

• If the plunger does not retract, the solenoid is

faulty and must be replaced.

• If the plunger does retract, there is most likely an

increased resistance type of failure in the equip-
ment’s electrical system. Perform voltage drop
tests to find the source of the resistance.

Figure 4.21

Afterfire solenoid lead from main harness

Ground lead

Figure 4.22

Extended

Retracted