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Gages worked good but suddenly they are hay wire i found why my alt was not working right it's ground was bad once i fixed it gages on my 1988 gmc went crazy had issues before now alt getting full batt charge they working wrong any one have extra set of gage cluster with needles that will fit. i can not afford to fix it looks like they had this apart the whole thing is broken and rigged togther and the u shaped peace that comes off dash is broken they used all wrong stuff to rig it since they broke it to remove it any help would be a blessing email me at give name and part i need so i know it's not spam. and return email or tx number thanks disabiled and hungry and bread winner is down no scrapping till i know how much gas i got

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U need a new instrumentcluster--napa has xchanges-prices good---u may want to try a junkyard too-many parts are good cause theyr just accident vehicles-------sometimes if u disconnect the computer plug or havit sweeped with a scanner-the gauges come back

Posted on Nov 25, 2013

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Posted on Jan 02, 2017

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SOURCE: Fuel level sensor in tank bad????

Yes it is all one unit, and yes that is what the problem is. don't use aftermarket parts, use OEM, (Delco Remy) they are much better quality.

Posted on Sep 08, 2008

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SOURCE: charging problem 1991 volvo 240

14.6 means your voltage regulator or diode is suspect Despite having new alternator .Ive cross refrenced your smptoms in the haynes workshop manual and alternator is your only end answer.The haynes test is to start vehicle with multi meter connected across the battery terminals,increase the engine speed until the reading remains steady should be approximately 12 to 13v and no more than 14v.switch on as many accessories as possible(headlights heater blower radio etc)check that the alternator maintains the regulated voltage at around 13 to 14v.If the regulated voltage is not as stated then alternator is to be repaired/replaced.Good luck with it and a happy new year.

Posted on Dec 29, 2008

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SOURCE: Gas gage doesn't work

It is possible the sender has failed, and can be replaced.

This sits in the fuel tank, so access has to be gained, usually be removing rear seats, access cover, and removing rivets and fixings.

It would be worthwhile to gain access to it and check first for any corrosion on electrical connectors. With a meter, you can check if it is working or not. If not - order a replacement before replacing it.

Please observe all safety precautions when working on fuel systems.

Posted on Dec 31, 2008

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How do you fix wiring for 1988 ford ranger4x4 wiring to the fuel pump

Are you wanting to wire voltage or ground circuits? Remember, you have to deal with the fuel gage sending unit circuit or the fuel gage won't work.
The basics, if single wire dedicated circuit, leave a pigtail wire, both ends, as long as the problem is between the pig-tails, run a new wire, splice into pig-tails. The new wire can lay anywhere till you do some testing to see if it's going to work.
I short-handed this post a little. I wasn't sure exactly what you have going on?
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I replaced the gas tank on a 1988 ramcharger now the gas gage dose not work it was working before

You can ground the wire going to the gauge at the tank to see if the circuit is good. Grounding the wire should make the gauge move. Then check resistance on that wire going into the tank. It could be a broken circuit inside the tank.

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1999 Toyota Avalon battery discharge light and abs light intermittent. Changed battery and alternator no change to issue. Checked voltages with multimeter 12.73 with car off and 17.03 with car on. Ple

17v on is bad. its too high.
are you using a good voltmeter. a DMM, ? or relic analog meter.?
you put a new alternator in the car? not from autozoned i hope.
the wiring to the Alternator must be all good, them includes the case ground and battery cables, end to end, good and tight and not corroded.
the regulator is inside your ALT>
the ALT has 5 connections 1 is ground. any bad, reg can go nuts.
newer cars , go less nuts. they detect more errors and shut down
your is overcharging and will burn a battery up in no time.(heat)
Grounds good.
idiot lamp ,must be there, an working or alt may start up dead.
the lamp creates excitation currents, to boot up ALT.
wire B, goes to battery via fuse link, if this big wire fails. all bets off.
wire IG goes to 7.5A gage fuse, it must not be blown.
wire S, (sense) is 5amp ALT-s fuse, this senses battery voltage
if this wire drops in voltage the ALT will go to max. (or shut down)
toss coin there, lots of regs sub'd out in so many years, and rebuilts.

the regulator is not working right.
that means 3 things.
1: reg is bad.
2: reg is being lied to. (bad wires) even bad battery.

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1 Answer

I have a 2005 gmc seirra with a 5.3. I have replaced the alt. and the voltage reg. and after running for some time the volatage starts going down. if i turn the engine off and recrank it .. it will ch

Isn't the voltage regulator part of the alternator ? did you replace the right part ? are your connections tight ! good ground ? some new alternators go bad , check all your connections first, check your grounds, wonder if your gage is bad ? use a amp meter to check voltage , 12 to 14 volts is normal.

Mar 01, 2013 | GMC Cars & Trucks

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Blowing brake light fuses 1988 E150. Brake switch

To Track down the problem you need to disconnect the Battery and use a Multimeter set to OHMS.

You are grounding somewhere. Start with the Brake switch and see if it is grounded. Then take off the wires to the switch. Check the wires going to the switch and coming from the switch. One side has to be the problem. Check with a parts place like Autozone or Oreillys for a Brake relay in the power box. If the power wire is grounded unplug the Brake relay and see if it drops the connection.

If it is a wire problem, keep tracing the grounded wire until you find a connection you can unplug to make the Ohmmeter drop. Remember the overhead Brake light on the roof. You may have just worked on the Taillights. The bad wire may be grounding in the roof or on the frame.

Once you isolate the bad wire you may want to run a new one.

Jul 04, 2010 | 1988 Ford Econoline

2 Answers

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1 Answer


The prob seems like you have connected the power to your stero from the wrong place. You cut into live a wire for the power, this should be connected at the ACC on your fuse panel. Also make sure you stero has a good ground! Frankster016

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