Boats For Sale:
Cleaning Wiring Harness Connections |
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td_in_nc 
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Joined: March-30-2012 Location: Clayton NC Status: Offline Points: 381 |
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 Topic: Cleaning Wiring Harness ConnectionsPosted: March-15-2014 at 10:36pm |
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I had a little time today and checked the voltage at the alternator which 13.9. I checked the voltage at the ignition switch and it was 13.8. I also checked the voltage entering and leaving the gauge control unit which is 12 volts which is what it is suppose to be. After troubleshooting and following the instructions from medallion (the gauge manufacture) it indicates the wiring harness is bad. So now I have to figure out where the bad connection is. I am trying figure out how to know what to check as I am following the wires. |
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td_in_nc
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Posted: February-23-2014 at 9:17pm |
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That is why I life in NC is good! When I work on my cars I do not need a gallon of liquid wrench and a cutting torch. When I was young in NW PA they use to dump the brine on dirt road from the oil wells to "keep the dust down" |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: February-23-2014 at 9:11pm |
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oldcuda
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Posted: February-23-2014 at 9:00pm |
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When I am at Harbor Frieght buying my quality tools it's no trouble to grab an extra pkg.
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8122pbrainard
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Posted: February-23-2014 at 7:14pm |
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Why go through the trouble? McMaster has them down to .024 diameter Even Dremel markets small diameters. |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: February-23-2014 at 7:09pm |
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Wisconsin, (the cheese head state)  has been spraying left over salt brine from cheese processing on their roads!
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oldcuda
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Posted: February-23-2014 at 6:33pm |
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Go through this all the time with my freightliner I bought a bag of mini bottle brushes clip them so I can put them in my cordless drill.Spray contact cleaner in female side and scrub them out real quick.Spring time I go through as many plugs as I can to get the salt or whatever that toxic sticky stuff they are putting on roads these days .
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: February-23-2014 at 6:03pm |
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As Chris states, this is important since it will check any problems with the wiring/ignition (key) switch too. |
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SNobsessed
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Posted: February-23-2014 at 3:38pm |
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Put negative lead of voltmeter on engine ground. Check voltage at alternator output terminal with positive lead (engine running). Then check voltage at the dash terminal you are suspicious of. The difference is the drop. I recommend you also check voltage at input of ignition system (usually ballast resistor if you have one) as that checks the whole loop.
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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td_in_nc
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Posted: February-23-2014 at 2:13pm |
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I am not sure at this point and it may be a little while before I can check. Dumb question of the day.... How do I check the voltage drop from the engine to the dash? I did check the Volts in and out of the Module and it was 12.
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8122pbrainard
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Posted: February-23-2014 at 1:54pm |
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td_in_nc
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Posted: February-23-2014 at 12:11pm |
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Thanks guys! Looks like the sell Deoxit at Radio Shack..
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SNobsessed
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Posted: February-23-2014 at 11:20am |
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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td_in_nc
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Posted: February-23-2014 at 10:37am |
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I am having issues with several of the gauges (volt, temp, oil) not working and the gas gauge pegs and vibrates. I was messing around with some the connections and go the gas gauge to read correct one time, then lost it. It is tough chasing this without an observer. I have only started digging into it as it has been cold and wet here. The module on these boats (2000 Supra Launch) are notorious for going bad because the speedo tubes connect to them. They have a trouble shooting guide and I have only started doing that so I did not check the voltage drop yet. Based on what I have read and found so for I think it is a bad connection somewhere (they had issues with harness as well) I just need some time to chase it down. Since I am taking things apart I want to clean and I like the suggestion of using dielectric grease. The pins are very fine so I am concerned using scotchbright. Was reading up on other sites and there is all kinds of suggestions - many not so good. The one hotrod site suggested Sprayon EL749.
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8122pbrainard
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Posted: February-23-2014 at 10:26am |
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Tom,
You are on the correct track with finding voltage drops. What is the voltage drop from the engine up to the dash? Typically I will use some Scotchbrite on both the male and females. Getting into the females require small pieces rolled up tight. Don't over do it to the point of removing the tin plating on the pins and sockets. Use dielectric grease when assembling and check the voltage drop again. |
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JPASS
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Posted: February-23-2014 at 10:24am |
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what's the issue you're chasing?
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'92 Correctcraft Ski Nautique
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td_in_nc
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Posted: February-23-2014 at 9:59am |
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I am sure this has been covered somewhere else, but I cannot find it. I am chasing an electrical issue with my gauges and I want to clean all connections. I am looking for suggestions on how to clean the harness connections (male and female) as I am concerned about bending the pins or making it worse. Does anyone have a suggestion?
Thanks Tom |
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8122pbrainard wrote: