Wiring troubleshooting. Look at these two diagrams
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Wiring troubleshooting. Look at these two diagrams

  1. #1
    Senior Member Delemorte's Avatar
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    Default Wiring troubleshooting. Look at these two diagrams

    The first diagram is the wiring diagram i have as the basic how to wire your engine. The second is a visio drawing i made of my engine wiring. Now last week I blew up an alternator so i want to make sure when i go to install the new Alt and starter i hook this shit up properly. I think the old start just shorted out killing the alt but i could have easily cross wired something also. Please give me your input on any errors you may see. Ive looked at both of these till im blue in the face and just need a second set of opinions. I have a MSD control box and Dizzy and its a SBC if that matters. Obviously there is no ballist in my visio drawings and i lack the actual connections on the ALT and Starter (Ill double check which ones are which and update the drawings when the new ones arrive today.

    Edit: I also have an extra terminal on my bus (Alternator) but that is direct wired to the Battery slot ont he bus. It is showed in the drawing.






    thanks guys.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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    Kind of hard to tell since we can't see where the actual wires are going to each component. Looks OK to me but when you use the same colors multiple times it's way too easy to think one wire is actually a different wire since they use the same color.
    Last edited by hotrod56cars; 03-30-2009 at 07:18 AM. Reason: more

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    RvRrat
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    I can't figure out your drawing. Not sure why you need it. Use the schematic and number the wires you'll thank yourself later.

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    Senior Member Delemorte's Avatar
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    Yea when the new ALT and starter get here i plan on updating the drawing to make sure which actuall connections they are making on the actual device. The devices had wiring harnesses already installed so i was kind of stuck with Red and black and red and green on those suckers. If these dont come with prebuilt harnesses i plan on getting new colors as to keep it as simple as possible.

    As far as understanding im just mostly concerned with how that battery Starter alternator hook up. THe connections under the dash follow the first diagram. Im pretty sure the second diagram is a duplicate of the first just making sure im not missing something obvious.
    Last edited by Delemorte; 03-30-2009 at 07:39 AM.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

  7. #5
    RvRrat
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    Something on the starter doesn't look exactly right to me. I'm pretty sure there is also a relay (Bosch or similar) between the key/start and solonoid. That starter is showing 3 terminals, most have only 2 external terminals, 1 to the batt + and 1 to the relay +. But I could be wrong.

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    Senior Member Delemorte's Avatar
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    Quote Originally Posted by RvRrat View Post
    Something on the starter doesn't look exactly right to me. I'm pretty sure there is also a relay (Bosch or similar) between the key/start and solonoid. That starter is showing 3 terminals, most have only 2 external terminals, 1 to the batt + and 1 to the relay +. But I could be wrong.

    Yes that is confusing. My old starter only had two terminals. One where the positive battery cable came off of and anther. Both terminals also had a wire that came off going toward the terminal bus. but with out the ballist that third wire would not be there any way and i think originally (before the MSD control box) was coming off the terminal bus direct to the ballist.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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    Senior Member gregb's Avatar
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    The starter should be easy to hook up, what brand of parts are you using, the stock GM stuff or some aftermarket piece? If it's the stock starter even if the new one has 3 posts like the first diagram just ignore the one that goes to the coil (labeled R). The other wire goes to the ignition switch and should be easy to trace. You said they also had extra wires coming off going to the terminal bus? You need to trace those to find out where they connect, one might be the wire that the alternator charges the battery thru, don't know why the start post would have another wire. As forthe alternator, depends on what you are using, please post if it's delco, some mando marine unit, or other.
    Last edited by gregb; 03-30-2009 at 09:16 AM.

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    The third post was used to bypass the resistor to the coil during cranking with the old style points set up.
    Last edited by Oldelmn8tr; 03-30-2009 at 12:28 PM.

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    The first one is close, however..... I see no breakers or fuses, most quality Tachs use (purple wire) power and (grey) sender wires, wiring the boat like that (without slave solinoid) you must use 10ga wire for RED, BLACK, and WHITE to dash of boat. 30 amp breaker in RED wire from solinoid to terminal strip. 20 amp breaker on PURPLE fron key back to motor. 10 amp on PURPLE from key to gauges, 10 amp from RED off of key to accessories (bilge pump, lights, blower) then break each one of them down with smaller breakers. Then go have trouble free boating.

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    By making your own diagram and making your own color codes your asking for trouble. IMO

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    Quote Originally Posted by hotrod56cars View Post
    By making your own diagram and making your own color codes your asking for trouble. IMO

    X2
    [FONT='Verdana','sans-serif']Standard wiring colors:[/FONT][FONT='Verdana','sans-serif']
    Red - Constant hot. Direct to battery
    Black - Constant ground. Direct to battery
    Purple - Ignition hot. Wired to key switch
    Yellow w/ Red Tracer - Exciter wire. From Key to starter
    Gray - Tach Sending Wire
    Brown - Water Temperature
    Blue - Oil Pressure
    Brown w/ white tracer - Trim Gauge
    Green - Lights
    Tan w/ Blue Tracer - Emergency Warning buzzer
    Yellow - Blower
    Orange - Bilge Pump
    Pink - Fuel gauge (varies depending on manuf. Not constant)[/FONT]


    #55

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    Bouncing off rocks TryMe's Avatar
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    the only problem i see is that you have ignition voltage going to your alt.where that wire comes out of the alternator, it should go directly to the charging post that connects the heavy red wire to your battery. thats the sensing wire, it needs to sense battery voltage. by taking it all the way to the dash and back, you'll experience voltage drop, which in turn leads to the alt. over charging.

    as long as you're running a delco alternator, there should be a small diameter wire and a larger red wire in the pigtail connection. the large red wire goes to the charging post and the other one is not used or used for a dummy light on your dash
    Last edited by TryMe; 03-30-2009 at 03:53 PM.

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    Senior Member Delemorte's Avatar
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    Outlaw and Hotrod
    All the wire colors are different minus the Red and black or where it was hard wired into a device. Since i have it all charted i fail to see an issue with deviateing from "standards". What was left for me to figure out was FAR worse, not to mention the few from the OEM that were one solid color for all the wires. With all due respect (Seriously not sarcasticly) I appreciate the advice but it really does not address my question on exactly how to hook this up or what might be missing or wrong with how its all plugged up.


    As for the rest that actually responded to my question i TOTALLY appreciate it.. New stuff should be here on Wed so ill have complete diagrams and pics to show you what ive got. It should answer those questions you posed to me that currently i can not answer. Until then i aint touchin this until i know EXACTLY what i got... Most likely ill be pulling all the power wires and just following the first diagram to hook them up and revising mine once i get all the feedback.


    GFinish,
    I have zero breakers in this at all. When i was gutting no diodes or fuses of any kind were removed except trim control.. Do i need to install some fuses on this? Is that required or best practice. It aint a thing to hook up some fuses or a fuse box.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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    Senior Member Delemorte's Avatar
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    Quote Originally Posted by TryMe View Post
    the only problem i see is that you have ignition voltage going to your alt.where that wire comes out of the alternator, it should go directly to the charging post that connects the heavy red wire to your battery. thats the sensing wire, it needs to sense battery voltage. by taking it all the way to the dash and back, you'll experience voltage drop, which in turn leads to the alt.
    With the Alternator and battery terminals connected isnt that the same thing that you just suggested? I could wire the alt direct to the starter where the pos battery cable hooks up but it only saves me about 12 inches of wire.

    Edit: Or i could have them backwards red vs green.. Hmm.. When i get the new one ill make sure to get some pics of the back so i know what im talkin about. Right now with out knowing exaclty what terminal was red and which one was green it makes it ambiguous.
    Last edited by Delemorte; 03-30-2009 at 04:52 PM.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however

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