Max22 Glowplug relay wiring

[Max22TN]

I have a Max 22 (not an e max) that the glowplug relay is not operating. The glow plugs work when I jump the 2 larger wires together so those wires are ok. I hate to just change the relay (at 140 bucks) without testing it. There are 6 wires to it total. Two are large and (as I said, working). The other 4 smaller wires are what I need a diagram for. One must be to the light. Another one must go to a temp sensor but I don't know what to test for without a wiring diagram. Anybody got one or know what color wires go where?