wiring conundrum
Posted: 18 Jun 2020 07:27
Hello - wondered if someone could suggest a reason for the following- have put on the wiring harness I made and connected it up to a battery yesterday. Generally it works fine, new front brake switch etc - I haven't tested the ignition circuit yet as no fuel tank. As part of what I was doing I wanted to reinstate the idiot lights which have never worked, had to leave one as the bulb holder is broken but wired in the high beam and general lights (red one). Followed the early wiring diagram for this part as even though it is electric start 79 does not have some of the bits on the later diagram.
When checking I noticed that when the switch was on low beam I had a very faint light in the high beam and red idiot lights and nothing when on high beam. Assuming I had managed to reverse something I cursed a bit and started to look round - then realised I had simply not connected the earth from the idiot lights. Did this and they worked perfectly - red light to show lights on - high beam when high beam on and no low glow when on low beam.
So where was the electricity coming from the first time for the weak glow. where did it go once I had earthed it and how were they working with no earth?
Do I need to even resolve this bearing in mind it worked fine once earthed and I would never have known if I had not missed this first time.
I presume any issues are going to be in the left hand bar switch which am going to have to dis assemble anyway as the rocker switch for the horn was in a very poor state and on assembly the horn is stuck on - I will try to sort it but I think the switch is past it - don't suppose anyone has a replacement lying round.
Any inputs welcome - thanks - Duncan
When checking I noticed that when the switch was on low beam I had a very faint light in the high beam and red idiot lights and nothing when on high beam. Assuming I had managed to reverse something I cursed a bit and started to look round - then realised I had simply not connected the earth from the idiot lights. Did this and they worked perfectly - red light to show lights on - high beam when high beam on and no low glow when on low beam.
So where was the electricity coming from the first time for the weak glow. where did it go once I had earthed it and how were they working with no earth?
Do I need to even resolve this bearing in mind it worked fine once earthed and I would never have known if I had not missed this first time.
I presume any issues are going to be in the left hand bar switch which am going to have to dis assemble anyway as the rocker switch for the horn was in a very poor state and on assembly the horn is stuck on - I will try to sort it but I think the switch is past it - don't suppose anyone has a replacement lying round.
Any inputs welcome - thanks - Duncan