philh

The bike is going into a dealer who I bought a Puch cycle from years ago.He seems really keen to do the repair and says Giant are spot on when it comes to assistance.I didnt even know he was a Giant dealer. Thanks all,I'll post the outcome.

Contacted my supplying dealer today who refered me to Giants warranty department.They hadnt encountered this problem to date, but have arranged to give technical help directly to a nearby dealer and supply parts as required. Fingers crossed.

I think I'll have to consider returning it to the dealer, dont want to mess around and void the warranty, problem being the supplying dealer is about 70 miles away!!

Thanks Andrew.At the moment the bike is on charge and it will only switch on and go off immediately.

Just a quick question which may save me returning my bike under warranty. I can switch the power on, the 'dashboard' lights come on then go off almost immediately and power is cut. Occasionally the power will stay on for about 20 seconds then go off. The bike has been used quite lightly and has only covered about 100 miles so far, if that. Any clues appreciated as it is a bit of a logistical problem to return the bike.

I'll try quizing a few dealers see what their opinions are. Pity I couldnt just have a simple on/off switch !!!! Thanks for the advice so far.

Its not the type of sensor you mention. The sensors just screw into the hub or crank housing. Whatever they take their 'sensing' from (hard to phrase ) is not visible. You are probably correct about the rear one being the speed sensor. Would it be possible to do away with both as Id pedal away first anyway and Im not intending to break any speed records. Obviously the fault could be elsewhere and will probably need a process of elimination.

Thanks for the quick reply. To power the motor up on its own I disconnected the block connector which is a few inches up from the front hub and used a 12v supply connected to the red/black wires, so driving the front wheel directly with no other influences. I think the bike is supposed to be a pedelec in that it only powers up if you pedal away first although you do not have to keep pedalling once on the move. it has two positions on the key 1.power assist 2.pure power. Seems a bit strange that it 'conked' after going down a kerb but I cant find any evidence of anything with apparent 'jarring' damage.

I have recently bought a secondhand powabyke euro. Second time out I rode down over a kerb and from then on it has stopped working! Im fairly competent with Electrics having previously worked with electric wheelchairs and similar, even so I find the system a bit baffling. The battery is fully charged and the LED panel lights up normally. All connections seen intact and the motor powers up when I connect it from an independant battery. The throttle assembly is a recent new part. The bike has what I describe as a 'motion sensor' in the rear hub and one also under the crank assembly.(are these 'hall effect' sensors?) Has anyone any experience of simplifying the set up,possibly eliminating the two sensors mentioned altogether, and is there a way of teporarily bypassing the throttle assy (for test purposes only).If it had two wires I could 'jump' them together but there are 3 wires.Not sure how to test this. I have a digital multimeter if anyone can offer a test sequence. Any tips or advice gratefully accepted! Thanks. Phil.