articcummins
New member
The red light on top of the oil pressure gage on my Jinma 254 is on since I buy the tractor, what is that light for.....
OK, misnomer on my part. I call it an ignition switch, wrong I agree but a large percentage of the population calls it that as well......MikeYou don't have an ignition switch
If you have an ammeter, you can actually "see" the glow plugs energize and heat. As soon as they draw amperage, the needle dips sharply negative. The fact that resistance changes with temperature is why you can actually "see" the GPs heating up, you just have to keep your eye on the ammeter needle movement. Mine would dip to somewhere between -25 and -30 amps initially, and I'd hold the keyswitch at HEAT until the amperage draw decreased to about -12 or so. At that point I switched the key over to START. And since I had the Ford cold start switch too, the plugs continued to glow in the START position as well.I wouldn't know if the bus is energized.