Originally Posted by juliandelaney
Can anybody let me know the correct ampage for the fuses, It occures to me that mine must be too high to allow cables to fry. Thanks Julian
If I recall correctly, otherwise it is 15A.
Are you running your bike at winter?
Salt, road salt.
A damaged insulation of a cable will cause that with the nice and helpful aid of roadsalt...
Aquaintance of mine, who worked (works?) at Ericsson Mobile (car electrics - ambulances etc) installed some extra cables on my R80/7... I have melted H4 bulbs and sockets... then I checked how he had connected the fuses... in parallell... I have access of about 400-450A inside the headlight -before- any fuses blow...
Have you or previous owner tampered with the wiresystem?
It is -not- uncomming for the wires inside the main loome rounding the steeringhead to get shorted on /5-7 pre 85.
On the RT/RS there is yet a tiny snag...
The screws secruing the fairingpart above the oilcooler have a screw that hit the wireloome directly... start checking there - you might have a wire that have been damaged by that screw -
Rember that BMW have installed 0.75mm2 wires where the actuall demand is minimum 1.5mm2... hence it is quite smart to install the two extra relays that I suggested inside the headlight... let me know you mail-adress so that I can send you photos of where and how to install (sorry - failed to figuree out how to post photos here... "quota filled" is all I get...).
...you are not running H4 130/90W?... that -will- burn the wire...
You should -not- use a stronger bulb than 90W/80W (which do not exist), so Phillips X-trem Power (60/55W shines like 90-100/85-90W) is the best option (way too expensive but will give off a fairly good light; no other bulbs comes even close less one chooses the rally bulbs that melt the wires, reflector and blows the fuses...)