The glow plugs can be tested in 2 ways:

•

Perform an amperage draw test with an inductive pickup lead at each glow plug. The rated amp draw should be 6-7.5 amps per glow plug. Or install the inductive current clamp around the glow plug power supply wire. Take the system's current draw reading and divide the reading by the number of glow plugs in the system.

•	A continuity test can also be made with an ohmmeter between the glow plug lead and ground with the buss bars removed. If no continuity exists, the glow plug will not heat and should be replaced.

1. Tilt the cab. Refer to Cab Tilting .
2. Disconnect the negative battery cables. Refer to Battery Negative Cable Disconnection and Connection .
3. Disconnect the glow plug power supply wire.
4. Disconnect the glow plug buss bar.
5. Remove the glow plugs from the cylinder head.

Notice: Refer to Fastener Notice in the Preface section.

1. Install the glow plugs to the cylinder head.

Tighten
Tighten the glow plugs to 20 N·m (15 lb ft).

Install the glow plug buss bar.

Tighten
Tighten the glow plug buss bar to 1.2 N·m (10 lb in).

3. Connect the glow plug power supply wire.
4. Connect the negative battery cables. Refer to Battery Negative Cable Disconnection and Connection .
5. Lower the cab.