Well your in luck that at least it is a 30Amp relay which will last quite a bit longer, the most common ones are in general 20 Amps.
The tape itself is only a signature that when it was fitted they couldn't organise the wire lengths sensibly to choose a point where the relay could be mounted to the chassis securely. If you want to save money then my suggestion;
1. Find a location where the relay can be securely mounted using the fixing tab,
2. Identify the two wires that go to the coil - connections 85 and 86, one will go to Earth/chassis the other will go to what is termed the IG2 circuit from the Ignition switch, it should go to one of the fuses fed by the IG2 circuit - my choice would be this fuse;
and it would pickup the lower fuse connection (Green wire) or you could pick it up on relay I1-01 under the bonnet;
- but it could also go to 3 other possible fuses;
If it isn't one of the above then its on the wrong circuit and needs to be re-wired. See if you can identify where it goes and feedback here and we will try to help.
3. Check that the wires going to each battery are decent automotive cables ( relay connections 87 & 30) they should be rated at least to 30 Amps (44/0.3mm = 3mm²) - often people use mains wiring which is adequate electrically but the insulation is of the wrong type, it burns with a lot of smoke and is not adequately resistant to abrasion which is almost a certainty in most cars from the vibration! There should be an in-line fuse of 30Amps in each wire as close as possible to each battery.
4. With the relay mounted in the new position re-wire the 4 wires above to the relay, using new cable if needed, make sure that the cables can be fixed securely along there length as well, as in the new MOT regulations about to appear loose wires are a failure (see
http://www.igmaynard.co.uk/bongo/forum/ ... 16#p480916 ) to do that you will need a reasonable crimp tool and some 6.4mm terminals to replace the ones on the old wires.
However my instincts suggest that rather than doing this from scratch its better to use Willinton kit if possible, as the relay he provides is a big improvement on the type fitted, and being a VSR type it doesn't need the extra connections to the the Ignition circuits.
