2002 john deere 5420 no start

darwin d · Jan 20, 2015

Hi new to this site. I have a 2002 5420 with key in run position I have power to the fuel shut off. Turn key to start It will crank but no power to the fuel shut off. Put direct power to fuel shut off and crank, it starts right up.any thoughts thanks

Leejohn · Jan 20, 2015

Key switch.

Tx Jim · Jan 20, 2015

Have you looked for a blown fuse

JD5210 · Jan 20, 2015

I have attached a diagram for the 5X10 starting system, which is close if not the same for the 5X20. You will see that the path to the fuel solenoid is different when the key is in the run position and when it is in the start position. Since it cranks the safety switches are ok. I would say the bypass start relay is bad or contacts need cleaning. If the bypass start relay is not working current flows of it onto the fuel shut-off relay, which cuts power to the fuel solenoid.

If needed I can provide you with a write-up on how the starting circuit works.

On my 5210 the relays are located under the left cowl. Before pulling out the relay, I suggest you disconnect the negative battery cable either at the battery or where the cable connects to the frame.

darwin d · Jan 20, 2015

Thanks for the reply. I have 2 bypass start relays replaced both. Fuses all good. What I would like to find is a wiring diagram of the fuse panel. I'm thinking that the problem is in behind there. Forgot to mention that I have a cab so fuse panel below steering column not an easy spot

navistar505 · Jan 20, 2015

Does the fuel shut off solenoid have 3 wires?

JD5210 · Jan 21, 2015

I have attached a wiring diagram for the 5x10, that is all I have. I take it replacing the relays did not solve your problem? You may also want to unplug the cold start advance from the fuel solenoid, I doubt this is the problem, but cannot hurt. I included a picture of the sensor.

You may want to check out the web-site selectmanuals.com for a set of manuals for the 5x20.

The John Deere site for manuals is.

John Deere Ag - New Equipment: Technical Publications - Equipment Search

Here is a link to the operators manual if you do not have it.

http://manuals.deere.com/omview/OMRE199128_19/?tM=FR