pinkfloyd4ever Posted July 31, 2012 Share Posted July 31, 2012 Bought new boat. Removed motor from old boat onto new boat. To make gauge removal simpler (I thought) I disconnected wires at assorted harnesses, now I am scratching my head.There are some obvious yellow to yellow, blue to blue, but I am stuck on the black grounding and a black wire with orange/red stripes on it, it doesn't seem to have a home.From the 703 unit to gauges I have yellow, blue, black and green wires. The trim harness connected to the tach harness, green to green, blue to blue, yellow to yellow with the yellow wires with red stripes also joined. I am stuck with a black wire with red stripes coming from the trim gauge that doesn't have a homeany help is appreciated Quote Link to comment Share on other sites More sharing options...
boatfixer Posted August 1, 2012 Share Posted August 1, 2012 I'm thinkin its a ground. What I think some manufactures do is color coordinate the grounds. The red stripe may be indicating the circuit its grounding. Quote Link to comment Share on other sites More sharing options...
pinkfloyd4ever Posted August 1, 2012 Author Share Posted August 1, 2012 I am wishing it was that easy but its not, why I didn't snap photos of the wiring before disconnecting I will keep kicking myself over. I haven't blown a fuse but no power to either gauges Quote Link to comment Share on other sites More sharing options...
delcecchi Posted August 2, 2012 Share Posted August 2, 2012 Have you tried looking for the appropriate manuals or wiring diagrams online? It is amazing what is out there. This is a wire from the trim gauge? Or from the motor? Quote Link to comment Share on other sites More sharing options...
pinkfloyd4ever Posted August 2, 2012 Author Share Posted August 2, 2012 I have tried doing searches, I just never seem to locate the wire colors that the motor came with, its all the original wires, no re-rigging on my part. I am talking about the wires coming from the T/T gauge and the tachometer and back to the wire cluster that comes out of the 703 remote Quote Link to comment Share on other sites More sharing options...
delcecchi Posted August 4, 2012 Share Posted August 4, 2012 So you can't find the installation stuff for the remote? Or the gauge? After re-reading it sounds like the unexplained wire comes from the gauge. Who made the gauge? Is the same remote you had before, so you know it was connected? Quote Link to comment Share on other sites More sharing options...
pinkfloyd4ever Posted August 5, 2012 Author Share Posted August 5, 2012 yes this is the original gauges for the motor. The tach and the trim gauge wiring, yes it was all working for me prior to disconnecting Quote Link to comment Share on other sites More sharing options...
marine_man Posted August 20, 2012 Share Posted August 20, 2012 The black is ground.. the black with orange stripe is another question... I believe it's a sender connection of some sort... trim sender?marine_man Quote Link to comment Share on other sites More sharing options...
pinkfloyd4ever Posted August 20, 2012 Author Share Posted August 20, 2012 I wish I knew, the RPM gauge is working, the backlights work when dark, but the trim gauge always reads that its in the up position and the oil and temp silly-me lights don't work. Obviously I have something misconnected, just haven't figured out what Quote Link to comment Share on other sites More sharing options...
pinkfloyd4ever Posted May 18, 2014 Author Share Posted May 18, 2014 I haven't spent the last two years wrestling with this, but with some free time, I thought I'd try to tackle this again with the same results.Does a 99 F50 have any sort of fuse box? The only reason I am asking is because it just seems that the T/T gauge, no matter how I wire it just jumps to the high position regardless, which makes me think somewhere I have some sort of short or something. The motor runs fine, the RPM gauge works. The backlights come on in low light. The oil and temp lights do not come on in the key on position, though only the oil lamp would light up in the key on position. So from the 703 are 4 solid colored wires: Black, yellow, blue, green. The analog gauges have a snap together harness that clearly join together. The tach and T/T have blue and black wires for the backlight. Both also have a yellow wire with red stripes and the T/T has one black wire with red stripes. Only two results happen no matter how I try to hook the wires: nothing or the T/T needle jumps all the way up. With a volt meter with the black grounded, yellow has power in the key on. The green wire seems to be a negative type, by that I mean it reads negative, but if I reverse it and put black to the green wire and red to the ground I get a positive reading. Any ideas? I can live without a T/T gauge working, but I would like some comfort knowing the temp and oil gauge lights are workingThanks Quote Link to comment Share on other sites More sharing options...
jmd1 Posted May 18, 2014 Share Posted May 18, 2014 does you gauge have 3 posts on the back or two? I am thinking that one wire is the down trim signal wire, then there would be an up signal, a power wire and ground. so if you hook the black to down the black with stripe to up, green to ground, yellow to power what happens? fuse the wire you put to power so it does not melt the whole mess. take pictures if possible Quote Link to comment Share on other sites More sharing options...
pinkfloyd4ever Posted May 18, 2014 Author Share Posted May 18, 2014 Quote Link to comment Share on other sites More sharing options...
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