Ticking noise from under the bonnet when parked and locked.

[edwardmk]

Originally Posted by COLVERT

Unlikely but possible.

Sorry to repeat this BUT-----If you connect a charger in the same way you tried connecting another battery IT WON'T work. Either both ways work or none at all.----You have a wiring problem. Definitely !!!!-------

I'm pretty sure I had a good connections with the clamps on the towbracket and Pin 9. I'm thinking the old trailer socket may have some oxidation somewhere on the line to the battery.
I thought as an alternative ( in theory ) if there was indeed a poor connection between pin 9 and the battery, I could trickle charge the battery through the trailer socket, but was frustrated when the alarm started up. The battery definitely was charging albeight slowly. I was really hoping your excellent suggestion would work Jon. I'm thinking to try charging until the alarm goes off, and then slap on the V8 battery with the engine running and try four quick presses on the fob before I abandon hope and take off the wheel arch liner and try the open the bonnet approach.