Wacker Neuson Engine Starting System RD 12/RD 12Awc_tx000746gb.fm 424.2 Checking the Wiring to the Starter Solenoid & Anti-backfire SolenoidPrerequisites Fully-charged (approximately 12V) batteryBackground Black wire #20 delivers 12VDC to the starter solenoid when the key is in theSTART position. If this wire is broken or disconnected, the engine will not start.Procedure Follow the procedure below to check the wiring to the starter solenoid.1. Open the hood and locate the starter/starter solenoid (a).2. Check the condition/connection of black wire #20 (b) to the starter solenoid.Is the wiring OK?3. Check the condition and connection of the black/yellow wire to the anti-backfiresolenoid.Is the wiring OK?4. If the engine still won’t start but cranks, remove the anti-backfire solenoid (c)and clean the valve portion of it with carburetor cleaner. Re-install it and try tostart the engine.The wiring to the starter solenoid and anti-backfire solenoid has now beenchecked.Yes ____ No ____Continue Reconnect or repair red wire.Yes ____ No ____The wiring is OK. Reconnect or repair red wire.wc_gr004129ab
