Ignition warning light

Previously roger_johnson wrote:

My ignition warning light does not come on when the ignition is switched on. I have tried 4 similar bulbs all of which work off the battery but still will not come on. I have checked the circuit; I have good battery volts available at the input to the bulb,out of the bulb holder and at the lead at the alternator input. When I use my Fluke Meter across the battery I have good battery voltage, when I start up the volts across the batter rises as I would expect. Can anyone provide a solution as I don't have much hair left.

Thanks Roger

Hi Roger, I don't like to state the obvious but have you checked that you have a good earth connection? Good luck with finding a solution you have checked most of things I can think of but I'm sure it will be something simple in the end.

Cheers, John

What bike are we talking about, I just replaced the main and headlamp harness on my MK2A, only item I could not get to work was the A O warning led light which was working before I had the harness fail, despite checking everything you tried I could not get it to work. What did work was a new assimilator from RGM and using the old type bulb. Still non the wiser on the LED as the control unit shows voltage output when it should.

You need to specifiy bike. Had the same problem on a Commando and it turned out to be the warning light control unit.

The 3AW 'tin can' warning light assimilator is junk. It was junk when new evenbefore sale. The black 5 terminal MKIII assimilator was ok. But both of these items only assure you that there is an output from thealternatorthey do not tell you any think that is happening at the battery. A O Services produces a Warning light switch which does switch the dashboard lamp of with a rising battery voltage. But a lot more information is got from the BSM, the A O Services LED charge monitor. John Holmes, if you would like to return your unit I will check it out for you. Further details of the product from the web site if needed.

Al Osborn.

Alan, your solid state box tests ok, its output is as expected but wired into the new harness exactly how it was wired into the old harness it does not light the bulb, That would suggest operator error ie me. The new one I got from RGM is solld state too but with the 3AW tin can terminals copied so I will run with that.