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Chrysler Repair/battery drain; '92 New Yorker


QUESTION: I have a Chrysler New Yorker. The battery went flat with nothing left on. Today I checked the current drian from the battery with nothing on, it is  .17 amp.  
Then I found that the elec. transmission relay clicks on whenever the battery lead is connected. If I pull the relay there, is no current drain from the battery.
So what is happening here?


ANSWER: What is the model year of the New Yorker? I would like to look at the wiring diagrams to be specific.

---------- FOLLOW-UP ----------

QUESTION: Sorry I should have noted that.  1992 Fifth Avenue

Hi Alan,
If this is relay #6 you are describing, you can try switching it out with another relay with the same part number to test if it is the circuit or the relay. If another relay works the same way, then either the light green wire attached to in-board socket of the relay is shorted to 12v or the transcontrol module has an internal short to 12v and is putting it on the light green wire which it shouldn't until the ignition key is in the run position.
The transcontrol module has 12v on it at pin 56 all the time, but is should not be putting 12v on the light green wire at pin 15 until you turn the key to 'run'. So see what is happening at pins 15 and 56 of the tcm as far as the presence or absence of 12v. The other possibility is that the red/white wire attached to the rear pin of the relay socket is shorted across to the inboard pin of the socket as that red/white wire also carries 12v all the time and in fact the relay when activated sends 12v across to the front pin of the socket and that turns on the transmission power. So check what is going on in those 3 sockets of the relay.
The light green wire is attached to one end of the relay activation coil (which causes it to click) and the other end of the coil is attached to ground (the ourboard pin of the socket).
So there is an issue with why the light green wire on the inboard pin is getting 12v on it just because you connect up the battery. It could also be that a section inside the ignition switch is actually in the run position when the key appears to be in the off position. So unfortunately there are several different possible reasons which will likely require the use of a voltmeter to understand what is the problem here.
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Roland Finston


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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