Hello all. I need to finish repairs on my Epiphone Riviera before I start the builds on my GR and TLA kits which is requiring enourmous self dicipline and as I just want to get started on the new builds. Anyway, I have recently put together a wiring loom based on the Pitbull and SD Two Humbuckers to 2 Volume, 2 Tone and a 3 way Switch.. The problem is when I test the thing I'm getting no signal at the output jack. I have tried to trace back the fault and got the following results from the multimeter:
the pickups are supplying the required resistance to both volumes pots
Both volume pots are transferring the resistance to both tone pots
when I check the volume pots by placing either side of the multimeter on the input and output of each pot I get the correct resistance when dialled to ten and 0 resistance when dialed to 0
My Problem is:
I'm am not getting any resistance value from the output pins from both volume pots. Therefore no resistance being provided to the switch, or the jack and therefore no sound. I have checked the diagram and wiring 3 times and sure I've got it right.
Does anybody have any idea why this is happening?????
I'm taking readings off the middle pin and outside pin being the output and input. When volume on 10 I get full pickup resistance, and 0 when volume on 0, which I assume is correct. I'm also taking readings from both outside pins being earth and input pins as you queried, and the same results occur which I assume is correct again.
Yeah thanks mate, I have that one and thats the diagram I've followed. No resistance reading at the switch or jack because none feeding out of the pot. My problem appears to be related to the fact I'm not getting any value from the output of the volume pots. This occures when the volume pot is connected to the switch or is not connected to the switch. I've disconnected one of the wires from the vol pot to the switch to test if I get a value at the output pin of the vol pot. Answer was no.
Without it on my desk i am at a loss. I wired my Baritone ages ago and went nuts on it, and couldnt get it to work, its was a shielded braided cable touching on the shielding inside, had me stumped for a couple of hours then a palm slap to the forehead, it was right in front of me.
Man that’s a similar story to mine!!! I originally had the whole thing wired in braided cable and couldn’t work out why things would work one second and then not the next. I then too had the forehead slap moment and realised the cables were moving as I moved the loom and were then shorting against each other at different spots and creating unpredictable results for me.
I have come to my senses and swapped out all hot wires with standard audio cable and left the earth wires in braided only.
I just watched a youtube clip describing how pots work and based on details of one of my earlier posts:
“I'm taking readings off the middle pin and outside pin being the output and input. When volume on 10 I get full pickup resistance, and 0 when volume on 0, which I assume is correct. I'm also taking readings from both outside pins being earth and input pins as you queried, and the same results occur which I assume is correct again”
My understanding is that the volume pot on 10, will channel all resistance through the output pin and; the volume pot on 0, rolls off the resistance through the earth rather than the output.
It appears that maybe my output pin is acting like an earth?? I shouldn’t be able to get a resistance value when metering the output and input pins should I?????
Rodger, is the loom currently out of the guitar? If so, please post some pictures of it so we can take a look. Often something small will standout in an image that isn't obvious in text. Ideally, set it up with the pots and switch fixed on a piece of cardboard so that everything is facing the same way, and get some close-ups of the connections on the pots and switch. Hopefully we'll spot something.
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