Hi, I have a starting issue with my 1985 ram 50 diesel 4d55. I parked it once on a rather cold day and left it for maybe three hours, and when I came to start it, the glow plug relay wouldn't click, and it didn't start. It turns over just fine, but it does not start. I found later that it does start easily when I plug in the block heater overnight. I installed a momentary switch to the glow relay, and now it clicks, but still won't start when cold. In addition, I found that there is a 12 volt drain on the battery somewhere. If someone knows where that might be, please help!. Other things I have done are change the fuel filter and air filter, change the glow plugs, tried a different battery.
The symptoms include:
1 Not starting cold
2 No Glow Plug Relay click
3 A 12v drain on the battery
So there you have it, donít hold back any suggestions, I really need the help.