Copy the address and open it in your browser. that control box certainly is different, not seen one of those before. J&S went broke many years ago, the only bloke who may know the wiring on that is Mick Brown who used to work there.

The refurb buses use the same control panel as the DMS as the panel was found to be more reliable than the original type; the only defects usually found on them is the soldered joints are going dry after so many years. The earlier panels had relays, later ones are solid-state from what I've been told.

My bus number (if any): RML2532

As I've posted on here and on FB groups before, the difference is in the gear control panel. On the original set-up, the gear selector switches positive via the control panel and positive from there to the EP block on the gearbox.

On the refurb buses, the selector switches postive to the control box, that then switches negative to the EP block. Hence the importance of ensuring there's NO negative to body. A lot of people fit cigarette lighters/satnav/radio to the bus and ground everything as they would with a car. then strap the negative battery to the body. That's all well and good until the wiring for the gearbox chafes through, usually near the gearbox. As there's now one positive wire there and five negatives, whichever negative touches the body will engage a gear. the driver will also select a gear. you then get 2 gears selected at a time. Your gearbox will eventually fail. If by chance the positive return from th gearbox touches the body, you get a short circuit. When this happens the easy answer is to disconnect the control panel and bypass it.

Then you find the tacho or speedo doesn't work because that relies on the control panel for its feed.

For some reason unknown to me it's always 3rd gear that gives problems. I must have changed about a dozen gearboxes over the last 7 years with the same problems.

The wiring on the gear side is the same for the original and refurb buses; it's how it is switched in the control box that is different. The 2 different panel are interchangeable but they cannot be swapped and be expected to work. Also the by-pass plugs that are available or the originals won't work properly with refurbs. The wiring on the refurb variants IS different for things like engine run solenoid, charging systems, warning devices and the like, not to mention Centrecomm radio and CCTV!

My bus number (if any): RML2532