R.P.S. Corporation MAGNUM series, Service Manual

Page: 108 / 134

Magnum Service Manual V1.0
13
13-30
COMPUTER CONTROL SYSTEM
Was there
battery
voltage?
YES
With a voltmeter set to the
DC scale measure from
the negative lead to the
positive battery terminal.
Was there
battery
voltage?
With a voltmeter set to the DC
scale measure from both the
leads at the spray jet switch to
the negative battery terminal.
NO
Was there
power at both
of the leads?
Repair wiring between
the switch and the spray
jet pump.
YES
Flip the spray jet switch the
other direction and retest at
both of the leads to it.
Was there
power at both
of the leads?
NO
Was there
power at either of
the leads on the
switch?
YES
With a a voltmeter set to
the DC scale measure
the voltage from the
positive to the negative
buss bar with the
Machine turned on?
Was there
battery voltage
across the buss
bars?
NO
See “BUSS
RELAY” section
Repair wiring to between
the spray jet switch and
the positive buss bar.
YES
Call the factory
YES
With a voltmeter set to the
DC scale measure the
voltage from the positive to
the negative buss bar with
the Machine turned on?
NO
Was there
battery voltage
across the buss
bars?
See the “BUSS BAR
POWER” section
NO
Repair the wiring between
the negative lead and the
negative buss bar
YES
FROM
PAGE 1
“A”
MAGNUM SPRAY JET DIAGNOSTIC FLOW CHART
2 of 2
Replace the Spray
Jet Switch
NO
YES
NO