Export thread

HI Everyone,

My mower seems to run and start ok so long as I charge the battery now and again but the battery light it on and it isn't charging. The pics show the part number of a component that has a heat issue on the spade connectors and the melted spade connector boots.

Does anyone have access to a wiring diagram of this model of mower so I can try and figure out the issue?

Thanks in advance,
Dan.

A loose connection would make it heat up like that, make a note to which number they go to on the relay before you pull them off, and I would be replacing the ends.

Hi

Thanks for that, my basic understanding of how power flows lead me to already replace the spade ends, for good measure I soldered them on too to ensure a great connection. I did also wonder if perhaps battery acid or vapour could have accelerated the corrosion on the lower spade ends too as well as the melting from heat.

I've not yet replaced the (what I assume is a) relay as haven't yet found a part with the same exact number, there's similar ones on ebay but didn't want to go ahead without being sure it would work.

With a wiring diagram I figured it would be better for my testing.

Someone elsewhere suggested I check the charging voltage from the alternator or rectifier too which I've also not yet done.

All I have done was popped the cover on the dash under the bonnet, discovered the melted/corroded mess and thought, ooh, that don't look good I'll repair it. It still doesn't charge so was this a cause of a fault (I guess not since the fault persists) or was it a symptom of another fault or indeed a separate issue...

Thanks again.

Looks like a normal switching relay, i.e low-voltage circuit controls a high-voltage circuit. the under side should have numbers on them, where the wires go to.

From what I understand on wiring, blue wire comes from the key switch, (power on the relay) black is ground wire, white wires one from the regulator and the other to battery, you can check this by running along the wires.

Digi-key has them for $4.78.
Or you can go to an auto parts store and get a basic automotive relay.
Normal Termination;
85 - Coil 12V control
86 - Coil ground
30 - +12V feed from battery
87a - normally closed contact
87 - normally open contact.

If the new one still overheats, check the load current.