Could you please assist me? I have a Pro Rider trolley bought new some years ago which has performed well – ‘T’ handle version. It has started to become erratic, the speed varies and the display numbers flicker between the numbers. I have dismantled the handle which reveals a small rectangular panel c. 6 x 5 cms. I have also unscrewed the box under the battery tray which exposes a black box lettered SIG8-12v-J. I have looked at the spare parts on your website and whilst the handle panel looks the same as the one on my trolley, the other one has different wiring, in particular there is no chrome screwed connector. Also, there are two slide connectors, but the connection to one main looking wire is sealed into the black box. It seems to me that the black box spare part on your website will not connect to the trolley wiring, or am I missing something? If I just replace the handle panel, should this solve the problem?
I’d appreciate your advice.
From your description, I would say the fault lies with the speed control switch. This is the speed knob mechanism. It’s a fairly easy job to replace this and a very common part to get damaged. This is due to its protruding position where it often gets bumped or knocked, causing the inner resistance wheel to go off track inside the switch and causing this difficult-to-adjust fault i.e. making it erratic for speed adjustment.
I have a video and instructions on how to fit this speed control switch part into your handle on the website and a link on the purchase page of the online store for this part.