cranetruck

Chuck, make sure that the grounding of the control box is intact.
The lamp is tested by pushing it ("Push to test"), that way you know that the all important light works and ground is connected.
Here is the controller for the m656 (cargo), the xm757 (truck tractor) also had a fuel tank selector switch.

Attached Images

	m656_heater_control_box_158.jpg (119.6 KB, 667 views)

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Bjorn

MEP-018A (needs new generator head)

Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom, exhaust brake and more. (SOLD)
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor...the "improved MV".

"Some things can't be made better, just differently......a lot of things actually"