Wacker Neuson Engine Starting System RD 12/RD 12A
wc_tx000746gb.fm 46
4.6 Checking the Neutral Relay
Prerequisites Multimeter
Fully-charged (approximately 12V) battery
Functioning 20A main fuse
Functioning crank relay
Functioning neutral switch
Background The neutral relay relays battery voltage to the starter solenoid.
Procedure Follow the procedure below to check the neutral relay.
1. Open the hood and locate the neutral relay (a).
2. Place the key switch in the START position.
3. Check the voltage between terminal 30 (red wire #39) and ground. This test
may be done at the plug (b) with it disconnected from the neutral relay.
Is battery voltage (approximately 12V) measured?
4. Check the voltage between terminal 86 (black wire #31) and ground. This test
may be done at the plug (b) with it disconnected from the neutral relay.
Is battery voltage (approximately 12V) measured?
Yes ____ No ____
Continue Repair red wire #39.
Yes ____ No ____
Continue Repair red wire #31.
a
wc_gr004131
86
85
30
87
R 39
B 20
B 31
b