So this is how it went.
Standard battery, nearly 4 years old, now not holding a charge, even when on the optimiser. Note the only indication the Oxford gave was that it wasn’t fully charged (last Green light not on) despite being connected for 4 days.
Purchased a PC680 from Knights Batteries, see above…paid too much £90?
8 & 10mm spanners /sockets
Allen key to match new battery studs
Hot air gun
Small flat blade screwdriver
1. Remove off side faring panel.
2. Put alarm into service mode.
3. Disconnected Neg (Black) terminal.
4. Disconnected Pos (Red) terminal.
ALWAYS DISCONNECT THE EARTH CONNECTION FIRST AND RECONNECT LAST – THEN IF A SPANNER TOUCHES THE BATTERY WON’T BLOW UP!
5. Unclamp battery - mines broken off!
6. Remove three battery tray retaining bolts (12, 10 and 6 O’clock positions, the 6 O’clock bolt is hidden behind the three relays in the rubber block beneath the tray.
7. Remove the igniters pack to the left of the tray (two bolts)
8. Using a small screwdriver, unlock each connector and carefully remove the wires from the various electrical modules.
9. The tray should now be free.
10. Remove the rubber inner tray – this is no longer required nor will it fit.
11. Hacksaw off the right hand end of the tray and trim with a box cutter to remove any swarf.
12. Carefully hold the tray upright (a friend is helpful here) and heat the bottom of the trays edge and left hand side to soften the plastic.
13. Carefully insert the PC680 Battery in the tray ensuring it is fully home and push hard to the left.
14. DON’T HEAT THE BATTERY!!
15. Refit the modified tray using a locking compound on the threads.
16. Refit all the connectors
17. Using the old battery adapter plate turn it upside down and attach it to the Pos terminal, this will allow the start motor relay wire to reach.
18. Connect the other heavy Pos wire directly to the PC680.
19. Connect the Neg wires
20. Test then refit the side panel
I haven’t found a good way to secure the battery, but given it is wedged in so tight against the right hand coil it aint going up, it may go forward under heavy braking, so I need to fabricate a battery retaining bracket.
As every ford owner knows (or at least the older ones) an insecure battery is an MOT failure.
Hope this helps?