daigle
New member
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- Madawaska, ME
Hi everyone! New here and very impressed with the knowledge in this forum. It has to be one of the best forums I've surfed.
I picked up a MEP 002a last summer from a town auction. I just started messing with it this year. Not sure how long it sat. But it's got about 1460 hours, with a rebuild in 1990. Must have been rebuilt around 1000 hours as it has roughly 460 since.
I got the unit running without much trouble. A few gauges need to be replaced due to seal failures. When using my fluke to verify voltage outputs, I noticed that all my voltages are spot on across each leg. But when I checked out the ac receptacle j14, I was barely getting anything. I removed the access panel to find that the wires to the 15amp circuit breaker (cb3) were disconnected and electrical taped. Thinking this was my problem, I reconnected the two wires and re-tested. Still no difference. I verified proper function of CB3 and continuity between CB3 and J14. After no luck, I started to chase wiring to check for loose connections and the sort. I finally found a wire which had been cut and left disconnected. It looked liked it should have been tied to TB2 by the way it was routed with the rest of the local wiring.
Here's where things get a bit funky. Figure 6-6 AC output control Box wiring harness on pg 88 of the "intermediate and depot level maintenance manual" is what I'm using as a diagram. The wiring diagram over the control panel can also be looked at as well. Both diagrams state that cb3 and j14 are connected together by wire x12a12. Mine is like this. Now, the other connection to cb3 should be from wire x3b12, which ties it to S6-L3. The second connection to J14 should be from X6B12, which ties it to S6-6.
Now, what's puzzling me is what should be my X6B12 wire is labeled X12L12. It connects J14 to TB2-8. What should be my X3B12 is labeled X9L12. It was cut, and connects to nothing, but it looks like it should have been connected somewhere on TB2.
I'm wondering if I should connect it to the S9B circuit on TB2-2?
Not sure why my wiring is labeled differently than my schematic. Also a bit confused as to why my connections are not consistent with schematic. I understand that S6 will feed TB2, but even then the connections aren't consistent with schematic.
I was hoping to be able to reverse educate myself on the wiring schematic. The reconnection switch S6 has proven to be a nightmare to understand. What makes it even more difficult is that my schematic and actual connection positions are not matching up, which just throws another wrench in the spokes.
Any ideas on this little tricky problem? I don't want to ruin anything by connecting X9L12 to the wrong terminal.
thanks so much for any help provided. hopefully it wasn't too confusing.
I picked up a MEP 002a last summer from a town auction. I just started messing with it this year. Not sure how long it sat. But it's got about 1460 hours, with a rebuild in 1990. Must have been rebuilt around 1000 hours as it has roughly 460 since.
I got the unit running without much trouble. A few gauges need to be replaced due to seal failures. When using my fluke to verify voltage outputs, I noticed that all my voltages are spot on across each leg. But when I checked out the ac receptacle j14, I was barely getting anything. I removed the access panel to find that the wires to the 15amp circuit breaker (cb3) were disconnected and electrical taped. Thinking this was my problem, I reconnected the two wires and re-tested. Still no difference. I verified proper function of CB3 and continuity between CB3 and J14. After no luck, I started to chase wiring to check for loose connections and the sort. I finally found a wire which had been cut and left disconnected. It looked liked it should have been tied to TB2 by the way it was routed with the rest of the local wiring.
Here's where things get a bit funky. Figure 6-6 AC output control Box wiring harness on pg 88 of the "intermediate and depot level maintenance manual" is what I'm using as a diagram. The wiring diagram over the control panel can also be looked at as well. Both diagrams state that cb3 and j14 are connected together by wire x12a12. Mine is like this. Now, the other connection to cb3 should be from wire x3b12, which ties it to S6-L3. The second connection to J14 should be from X6B12, which ties it to S6-6.
Now, what's puzzling me is what should be my X6B12 wire is labeled X12L12. It connects J14 to TB2-8. What should be my X3B12 is labeled X9L12. It was cut, and connects to nothing, but it looks like it should have been connected somewhere on TB2.
I'm wondering if I should connect it to the S9B circuit on TB2-2?
Not sure why my wiring is labeled differently than my schematic. Also a bit confused as to why my connections are not consistent with schematic. I understand that S6 will feed TB2, but even then the connections aren't consistent with schematic.
I was hoping to be able to reverse educate myself on the wiring schematic. The reconnection switch S6 has proven to be a nightmare to understand. What makes it even more difficult is that my schematic and actual connection positions are not matching up, which just throws another wrench in the spokes.
Any ideas on this little tricky problem? I don't want to ruin anything by connecting X9L12 to the wrong terminal.
thanks so much for any help provided. hopefully it wasn't too confusing.