(Topic ID: 235746)

Backglass lamps cross-wired

By newbieinKC

5 years ago



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#1 5 years ago

I have two pairs of controlled lamps that say one thing and mean another. I think someone along the way replaced a wiring harness that ended up being backward or at least scrambled. When my EBC wants to light HIGH SCORE it instead lights BALL IN PLAY and vice versa. It also swaps TILT and GAME OVER. I have several options to fix the problem and wonder if anyone might have a suggestion. Swap positions of lamps, swap positions of female molex connectors in a harness, or swap wires and leave lamps where they are. There are other solutions, like hacking a couple of 2x6 molex connectors to fix the problem.

There are two reasons I ask for your opinion. First, the wire codes on the board and the flashers match; the disconnect is in a cable that has molex connectors on each end (one end picks up some wires from another connector, so simple replacement is not easy). Second, the swaps that need to happen are both on complete opposite sides of the backglass. Swapping wires or sockets might not be so easy and then wire codes will be ambiguous for future troubleshooters.

#2 5 years ago

The easiest would be to swap wires in the connector and leave the lamps where they are. Stick labels on the wires noting this for future troubleshooters.

Something along the lines of "harness was replaced and colors do not match manual" would probably cover it.

#3 5 years ago
Quoted from slochar:

The easiest would be to swap wires in the connector and leave the lamps where they are. Stick labels on the wires noting this for future troubleshooters.
Something along the lines of "harness was replaced and colors do not match manual" would probably cover it.

I don't have a molex tool. I see some pretty easy hacks but I can't seem to make them work for the female connectors. I will have to buy one.

I doubt that I will even label them when I am done, because the wrong wires don't match the convention inside the machine. I will just be swapping a blue wire on one end so that it makes connection with a brown/orange wire on both sides and restores function (now, the non-conventional blue wire connects to brown/orange on one side and yellow/white on the other). I wish one of the ends was male, I could probably figure out a hack to get them out (the ball point pen seems fairly straight-forward). Alas, both ends are female connectors and I can't get tweezers or staples to work easily enough to do it 4 times.

#4 5 years ago

I decided to splice/heatshrink the wires instead of buying a tool, waiting for it to arrive, and then perhaps not work or break. I just wish that whoever wired this in the first place didn't swap pins 1/4 and 2/6. They put the connectors in housings like one end was male and other female, when they were both female.

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