wire harness

where can i get a wiring harness for my 80 nautique?

I think John posted something about a harness supplier on just another mustang thread

Richard,
Here's the wiring diagram. However, considering that you needed to ask where to find a ground under the dash, it may be appropriate to get some help if you make the harness yourself or, go with Gary and Al's idea of searching out a premade harness?

SkiDIM sells the Pcm engine side harnesses. You should be able to get exactly what you need. Call if you don't see it listed. If you wanted to make something custom, a 10' harness/extension like what skidim sells (but unwrapped) would work perfectly. They're available from many marine part places, like ebasicpower.

The 8-pin engine to dash harness is the same whether you have a voltmeter or ammeter.

TRBenj wrote: The 8-pin engine to dash harness is the same whether you have a voltmeter or ammeter.

I would question the gauge of the wire in these pre made harnesses especially if you plan on using an ammeter. It looks like the red and black + feed. and - return are only 10 gauge. With a round trip wire length that doesn't add up to much even at a 10% voltage drop. Just like many have done, I'd certainly suggest up sizing those wires even if you are only using a volt meter. Check the load and then the amp charts.   

TRBenj wrote: 10awg on the batt, neg, and alt wires of the harness are certainly not overkill but are sufficient to support a stock electrical system. .

Not with an amp meter.

TRBenj wrote: 8122pbrainard wrote: TRBenj wrote: 10awg on the batt, neg, and alt wires of the harness are certainly not overkill but are sufficient to support a stock electrical system. . Not with an amp meter. Yes, with an ammeter. Better get your chart out. Thousands upon thousands of correct crafts were built this way.

Tim,
I don't care how many CC's were built that way. They were built for many years pushing the limits of wire capacity and to the point of being over the 10% voltage drop when loaded. How many times have we recommended up sizing wire to and from the dash to correct low voltage problems? Maybe you don't know how to read the voltage drop charts!! What harm is it to run some extra wire along with a pre made wiring harness?

Tim,

TRBenj wrote: This is a better way to look at it: There is no other way to put it!

Really???
You are really surprising me with you pushing the wire size to the minimum. You are typically very conservative with anything you do. Here's the link to the Blueseas chart you seem to be looking at. There are several factors that the chart doesn't show and you aren't taking into consideration. The temperature rating of the insulation and if the wire gauge is AWG or SAE size rated are factors but I'll assume the chart shows the good AWG gauges and the good temp rating of 105 C so no de rating. If wire is run in engine spaces, then derate by 15%. (60 x 15% = 51 amp) Then the big critical is if the wire is bundled into a group which really affects the cooling. The harness in question is bundled so 4 to 6 wires together that's a 40% derate. ( 51 x 40% = 30 amp) Now if a amp meter is used and going back to a 35 amp alternator if the battery and the boat electrical load is taking the full 35 amps, you are over the wire capacity!! I sure hope you have proper overcurrent protection with that 10 gauge!!!

Give it up Tim

You can't say it any better than you already did

Just remember, you live in the real world not Pete's odd little world.

KenO

Do the harnesses include ALL the wiring or just what's coming off the plug? I wouldn't assume the daisy chains to be included, or the ammeter return wire ("red to ign sw")

That makes a little more sense now.

Here is a link to Tim's makeshift pictorial wiring diagram for anyone else trying to follow along: http://www.correctcraftfan.com/forum/uploads/1765/Tims_wiring_diagram.jpg