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Dodge Repair/'00 Neon turn signal problem



I have pretty long discussion of my problem with Roland, but the site does not net me to ask another follow-up. My car is '00 Dodge neon (EU export model). Here is the whole discussion so far:

So, the turn signal flashes right side dimly when turning left. Only front and side signals are affected. We have ruled out multi-function switch, instrument cluster, and the grounds. There is no visual signs of wear or corrosion anywhere easy to inspect.

There is 40 ohms from instrument cluster output pin 17 to front left side positive bulb pin and 75 ohms from pin 16 to front right bulb. Roland told me there should be similar resistance, but there is quite big difference there. There is no ground present when measuring positive sides from the bulb pins. What does this resistance mean?

Hi Jaakko,
There is a limit to the number of follow-up questions so you have to ask a new question to continue.
In any case, the resistance readings seem high on both sides because these are simple wire connections. Perhaps you misread the ohmmeter? Could the readings be 0.45 and 0.75 which would not be so significant as to cause the problems you are having.
The wires for the turn signal bulbs go through separate harnesses after leaving the instrument cluster. These two harnesses pass through a disconnect at the wall between the dash and the engine compartment, at the far left of the wall. The disconnect actually has 3 separate multi-wire plugs, colored gray, black and natural mounted together in a large rectangular box. The left side turn filament wire is on pin 5 of the top gray plug (light green/orange) and the right side filament wire goes on pin 3 of the black middle plug of the three plugs (tan/red wire). So look for this set of three plugs mounted together in a box as I described. You can remove the respective plugs and check the resistance between the interface of both those wires and the instrument cluster and the turn signal bulb socket to see if you can located why the resistance between the two pathways differ from each other. It may be a dirty interface between the pin and the socket.
But if I am correct that you really have readings of 0.40 and 0.75 ohms on those two pathways from the cluster to the turn signal bulbs then as I suggested in my last answer to you I would suggest that you try your brother's instrument cluster in place of yours. The cluster intermediates between the turn signal switch and the bulbs and has some internal electronics ("drivers") one of which could be defective in your present cluster and therefor the cause of your problem.

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Roland Finston


Get a Free Fast answer to your repair question about a Chrysler/Dodge/Plymouth car, minivan, SUV, or truck. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty. This free troubleshoot advice forum helps you diagnose faults, minimize repair costs or do-it-yourself.

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I have do-it-yourself experience (50+ years) and a library of 100 1982-2012 Chrysler factory shop manuals and 20 multi-manual Chrysler Corp. CD's.

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Degrees in Physics/bruised knuckles.

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