1989 520H relays

[Kevinm 23]

I have a 1989 520H.   The  1991 wiring diagram  I have  shows relays. Some people have indicated that they are under the battery tray. There are none under mine. They only relay I found was next to the starter. I also found all the safe switches, but no kill relay. Is the 1989 wiring diagram different? I am diagnosing the starter circuit, as the relay clicks, but the starter does not turn. I checked all the safety's, and cleaned the 9 pin connector. It worked for a while, and now it will not start. Any help would be appreciated. I also plan to install a new key switch and a starter.

[gwest_ca-(File Mod) 10,478]

Garry

[Kevinm 23]

Thanks for the fast response!!

[biged77 107]

Before changing any parts I would check the battery voltage.  Should be 12.5V or higher.  Also clean the battery and solenoid connections including the battery ground.  You can rule out the starter by hooking a jumper cable from the battery plus to the starter, just make sure the tractor is in neutral and the PTO is disengaged.  

 

Ed

[Kevinm 23]

Thanks,

I went over every connection on the machine and cleaned and tested all the safety switches and coated the connections with dielectric grease. The battery is good and, I keep it on a battery tender. I think the only thing left s a dead spot on the starter. The correct wiring diagram will also help. I was going a little crazy working with the later model diagram, as it is not the same,

 

Thanks again.

[biged77 107]

Looks like you have done all the right things so far.  You are fortunate to have a 520H model with a simple electrical system, no extra relays.  The likely culprits are the solenoid or starter since you hear a clicking sound,  indicating the rest of the circuitry is working as it should {solenoid is getting an actuate signal).

 

Ed

[Kevinm 23]

Thanks. the troubleshooting forced me to go over the entire electrical system.

 

[cleat 4,936]

Here are the 2 wire diagrams both early and later.

 

I have converted all of mine to the early style for simplicity, reliability, and for the fact that in the end they both do the exact same thing.

 

I do not see why all the extra relays were added or why they decided to put all the charge current through the 9 pin connector.

 

This is the early diagram Wheel horse 520H wire diagram.pdf

 

This is the later diagram Later model 520 wire diagram.pdf

 

Cleat

[Kevinm 23]

Thanks