Hello guys
Before I start I have to confess that I am by no means knowledgeable when it comes to all things electricory so it could be that I'm just missing something obvious and, if so, sorry for wasting your time but here goes....
I have a rather frustrating problem with my 71' 40 series that I'm busy restoring. When I got the cruiser it came with 2 instrument clusters pictured here below:
(12 volt system)
Now the problem is that both of these clusters are grounding out on the following pins on the barrel connector and thus also grounding out those circuits, which I'm pretty sure they shouldn't be doing:
Pin 1: ground (good)
Pin 6: high beam indicator light - headlight dimmer switch
Pin 8: turn signal indicator light RH - turn signal switch
Pin 9: turn signal indicator light LH -turn signal switch
Pin 10: to meter pilot light - light switch
Now I have removed the loom (original) from the cruiser and stripped and traced it to see if there were shorts from these circuits to the black and white ground wire somewhere but there is not. The only time they come into contact is when the barrel connector is plugged into the clusters. When it's plugged in I get continuity between the #1 ground pin and the positive wires on those lighting circuits..
Furthermore even with the loom barrel connector unplugged from the clusters still I get continuity from the #1 ground pin to all the other pins mentioned above so it's definitely something going on with the clusters BUT the twist is that it only happens when all the small light bulbs are plugged into the cluster, these being the indicator bulbs, pilot light bulbs and the high beam indicator bulb.
What is going on? I am completely stumped and the only thing I can think of is that both of these clusters are damaged, one was apparently new. All the bulbs still work when I bench test them individually.
Can anyone tell me if I'm being a half wit or are the clusters cactus?
Thanks
Before I start I have to confess that I am by no means knowledgeable when it comes to all things electricory so it could be that I'm just missing something obvious and, if so, sorry for wasting your time but here goes....
I have a rather frustrating problem with my 71' 40 series that I'm busy restoring. When I got the cruiser it came with 2 instrument clusters pictured here below:
(12 volt system)
Now the problem is that both of these clusters are grounding out on the following pins on the barrel connector and thus also grounding out those circuits, which I'm pretty sure they shouldn't be doing:
Pin 1: ground (good)
Pin 6: high beam indicator light - headlight dimmer switch
Pin 8: turn signal indicator light RH - turn signal switch
Pin 9: turn signal indicator light LH -turn signal switch
Pin 10: to meter pilot light - light switch
Now I have removed the loom (original) from the cruiser and stripped and traced it to see if there were shorts from these circuits to the black and white ground wire somewhere but there is not. The only time they come into contact is when the barrel connector is plugged into the clusters. When it's plugged in I get continuity between the #1 ground pin and the positive wires on those lighting circuits..
Furthermore even with the loom barrel connector unplugged from the clusters still I get continuity from the #1 ground pin to all the other pins mentioned above so it's definitely something going on with the clusters BUT the twist is that it only happens when all the small light bulbs are plugged into the cluster, these being the indicator bulbs, pilot light bulbs and the high beam indicator bulb.
What is going on? I am completely stumped and the only thing I can think of is that both of these clusters are damaged, one was apparently new. All the bulbs still work when I bench test them individually.
Can anyone tell me if I'm being a half wit or are the clusters cactus?
Thanks