1989 Spectrum tank wiring ****MARINE MAN*****

[broncosguy711]

I need help from anyone that can advise me in how to fix, or find me wiring directions for this boat. as the gas tank is not reading and would like it to. It is a 19 foot boat and also am looking for a bow mount for it. and advise there would be good also.

Thnaks-

Broncos guy.

[broncosguy711]

Just moving this up as I forgot to add wiring to the title.

thanks-

Broncosguy

[marine_man]

On the bow mount... go for at least 50 lbs... preferably more than that if you can afford it. The 50 lb would probably work, but you'll end up running it at max speed a high percentage of the time, consuming your battery power pretty quick...

In regard to your gas tank... try taking the pink wire off the sender and touching it to the black wire coming off the sender mounting flange and see what your fuel tank does... it should go to full. If it doesn't try connecting the pink to a jumper wire that runs to the ground side of the battery... if the gauge goes to full after that you've got a bad ground to the fuel sender. If touching the pink sender wire from the fuel sender to the ground didn't do anything, but touching it to the battery ground did the ground to your fuel sender is bad.

If neither of those max out the fuel gauge take a short piece of wire and connect it from the ground wire on the fuel tank gauge to the pink wire on the fuel gauge - if the gauge switches to full then the pink sender wire from the gauge to the fuel tank is shorted out or cut somewhere along the way.

Start with that and let me know what you find out...

marine_man

[broncosguy711]

Thanks Marine man. I had to read it a couple times but makes sense. Will let you know how it turns out.

Thanks-

Broncs

[broncosguy711]

Marine man,

Finally got around to trying what you had suggested and holding a wire from the the pink wire to the ground wire does max out the fuel tank. other wise there is nothing with your other suggestions. I even re-wired the ground and sanded the spot where the ground attached to the boat with no results. I also replaced the pink wire all the way back to the gas gauge. Any other ideas?

thanks-

Broncosguy

[Jeremy airjer W]

Sounds like you need a sending unit. The sending unit has a variable resistor when the tank is full it has the least resistance. (when you grounded the pink wire you close the circuit with the least amount of resistance and the gauge read full) When the tank is enpty it has the most resistance (take the pink wire off the ground and the gauge reads empty because you have an open circuit or in theaory maximum resistance).

We know the gauge is good, we know the wiring is good, its time to pull out the sending unit and either repair or replace.

Quote:

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then the pink sender wire from the gauge to the fuel tank is shorted out or cut somewhere along the way.

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If the pink sender wire was shorted then the gauge would read full. "shorted" is the direct contact to ground of a powered wire with no load in between. The pink wire would have to be "open" or cut or broken somewhere to produce the empty gauge reading.

[broncosguy711]

That is what I was thinking. I am stopping off at a boat shop and picking one up on the way up north after work. a little more spendy but they are not that far off the main shot to the cabin. pay the price for convenience.

thanks-

Broncs

[marine_man]

Good catch Airjer...

I agree.. it's the sender then... pull it out and replace it.

marine_man

[Valv]

Quote:

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try taking the pink wire off the sender and touching it to the black wire coming off the sender mounting flange and see what your fuel tank does... it should go to full.

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Marine_Man I have to pick on you now....

I tried doing what you said but my fuel tank is still empty....I wish I can have it full just by touching 2 wires....

Sorry I couldn't resist, now you can get me with anything....I'm wide open.

[Jeremy airjer W]

[marine_man]

Really? Works on mine everytime... Maybe I'm just lucky

marine_man