White Outdoor 700 Series, Service Manual

700 SERIES LAWN TRACTORS

37

•

Interpretation

:  The wires that lead to this 

switch are readily visible and traceable.               
If there is no continuity to ground when the park-
ing brake is ON, look for broken wires, a loose 
connector, or mechanical damage that prevents 
the linkage from depressing the plunger on the 
switch.                                                                                                                               
If there is continuity to ground when the parking 
brake is in the RUN position, look for a chafed 
wire contacting metal or physical damage that 
prevents the plunger on the switch from extend-
ing when the linkage moves.          

17.23.The white wire that is adjacent to the yellow wire 

with white trace provides a 

ground signal

 to the 

RMC module when the key switch is placed in 
the 

REVERSE CAUTION MODE.

•

Behavior

:  There should be continuity to ground 

at this terminal when the key switch is in the 
REVERSE CAUTION MODE position.  

•

Circuitry

:  When the key switch is in the 

REVERSE CAUTION MODE position, a ground 
path is established by connecting terminal A2 to 
terminal L within the key switch.  The white wire 
from the RMC module connects to A2, and a 
green ground wire connects to L.   

•

Interpretation

:  If the white wire fails to reach a 

ground path when the key switch is in the 
REVERSE CAUTION MODE position, the RMC 
module will not arm or operate.  Check the key 
switch for continuity between A2 and L in the 
REVERSE CAUTION MODE position, confirm   
that the green wire connecting to the L terminal 
does have good continuity to ground, and check 
for any loss of continuity in the white wire that 
extends from the key switch to the RMC module, 
including the molded connector between the two 
components.       

17.24.If the RMC plug test or the pigtail plug test indi-

cates fault with any of the safety switches, the 
next step is to test the suspect switch.     The 
operation of those switches is described in the 
following sections.

17.25.The 

PTO Switch

 is located just to the rear of the 

mounting point for the PTO lever.                       
See Figure 17.25.

•

The plunger on the switch is depressed when 
the PTO lever is drawn rearward into the OFF 
position. The switch contains two sets of con-
tacts.  

•

A normally open (NO) set of contacts is in the 
starter inhibit circuit.  When the PTO is OFF, and 
the contacts are closed, power coming from the 
brake switch (key switch in START, brakes ON) 
through the orange wire with black trace is 
passed on to the trigger terminal on the starter 
solenoid through the orange wire with white 
trace.

•

A normally closed (NC) set of contacts is in the 
safety shut-down circuit.  A circuit is completed 
from the M terminal on the key switch through 
the yellow wire to the Magneto terminal on the 
RMC module through the yellow wire with black 
trace when the contacts are closed.  This gives 
the RMC module the ability to turn-off the engine 
when the PTO is ON.

Figure 17.25

PTO Switch (PTO OFF)