I didn't get a chance to play with it end of the week. Some one boxed it in with some old pallets and a dead crown truck.

Will be looking at it hopefully tuesday.

The VM had a small lithium battery loose in the housing, it appears to have came out of its holder. Its completely dead, I'm assuming thats just to keep the clock running?

I removed the plastic from the relay sockets and it appears that K3 and K2 were very heavilly oxidised. K3 has no connection to the track arround it. I've since soldered it up hopefully will show a tad more life now.

We have 2 of the older easi 30/40 trucks so I'm swapping the relays from them.

When you first key the truck on K4 latches and then when the key is turned off K4 stays active. Any idea there?

Thanks to all for the great help so far! I'd really hate to send this truck to scrap.