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Old 01-29-2010, 09:29 PM
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taurus/sable safety neutral switch failures.

some of you may have heard of or personally come across the issue with bad late 1990s ford taurus/sable safety neutral switches that cause things inside the car to bug out or intermittedly work also when shifting the column shifter.

i know of two of these cars doing this here in town, and i am about to replace the switch on both of them.
one possibly tomorrow and the other right after that one.

but i wanted to see if anyone here knows about this issue and knows any more about it than what i have found out so far.

here is a quote from the owner of one of the cars i speak of:

"The car runs well, tho has minor electrically problems which in result is causing the wipers, brakes lights, windows, interior light, speedometer, radio, heating control to not work."

same issues with both cars, like identically... the other car has things go out when shifting the column shifter, like the radio and such will go out when taking it out of park position.,

and some google searches came up with this switch shorting out due to wear, etc and causing these issues.,

it is also known as the Range Selector Switch.
another name for it is the Manual Lever Switch(dealers call it this name)


thanks for anything

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Last edited by fast68; 01-30-2010 at 04:03 PM.
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Old 01-29-2010, 11:17 PM
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elect problems

When I worked at ford one of the assemble plants was not using the proper connectors to test during assembly ( they were using a phillips screwdriver with the hot wire clamped to it. It distorted the connector terminal and it caused failure only after several months of arcing. It's always hard to find out what causes the problems. A mechainc friend used to walk thru the pick it your self salvage yard and see what parts were always gone.,,,Ford escort cylinder heads, escort and mustang turn signal switches, GM 4 cyl engines. etc.
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Old 01-29-2010, 11:47 PM
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a few years back i had a taurus that was doing some strange things.
i don't remember everything it was doing, but i remember power window problems and it
seems like it had problems with some of the warning lights in the dash.
i spent a fair amount of time looking for a bad ground.
i don't remember where i heard about the MLP sensor being a possible cause, but it did fix the problems.
it was just one more reason in a long line that i don't like fords.
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Old 01-30-2010, 09:03 AM
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Even the full size Fords have had MLPS problems, with a TSB for MLPS and harness connector replacement required on some of them.
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Old 01-30-2010, 03:04 PM
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oh the connector...... hmmmm...
which ones? any one?
or certain ones?
certain years?



so it just could be a bad connector pin terminal,
hmmmm...

can you get a new connector pigtail from the dealer or parts store?

one of these two cars is a '98 and it has the later style 10 pin connector

the other is a '96 and so it has the older style 11 pin, or possibly an 8 pin, not sure yet, dont have that car here yet, it is one we put a replacement tranny in and then sold, last fall.

and i didnt know this problem was in other models as well..

but i cant say that im not surprised i guess.,,


hmmm


thanks for anything else

Last edited by fast68; 01-30-2010 at 03:11 PM.
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Old 01-30-2010, 09:39 PM
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Its been a few years but I remember strange things that were caused by neutral safety switch.
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Old 01-30-2010, 10:34 PM
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yeah i didnt know about this until recently with the 96 we had and sold recently.
i originall read somewhere that it was a connector on the end of the steering column almost at the firewall. but now i cant find that info, and then i came across the tranny switch thing.

and so here i am now.,

the owner of the 98 im going to fix monday says she was told by someone that there are some wires by the front wheel damaged? or so she was told.

ABS ?

now i have to explain to her that that wouldnt be related to the issue of losing the interior power to random things, and that the wires by the wheel would probably for the wheel sensor and that would cause ABS light to come on, or malfunctioning brake pedal sometimes, or also possibly speedo issue. or both.
i dont know what sensor signals the ECM for the speedo, could be wheel sensors, or could be sensor in the trans output housing,. im not sure on the AX series trannies right now,.

thanks again
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Old 02-02-2010, 12:09 AM
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Trans Range Switches (one of Fords names for them) were a common failure issue. Replace the sensor and connector if necessary (Google the issue on the Ford forums). Look for the TSB info.

I don't see the problem coming from the switch itself but more than likely a problem in the column. Inspect the ign switch housing for the tabs coming loose. Look for the plastic connector separating from the housing (Another common elect problem with Ford). Loosen the bolts holding the steering column in place and wiggle the column and harness to try to duplicate the issue. Check the green ground screws located in various locations under the hood. Loosen and retighten them.
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Old 02-02-2010, 04:59 AM
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Quote:
Originally Posted by fast68
...here is a quote from the owner of one of the cars i speak of:

"The car runs well, tho has minor electrically problems which in result is causing the wipers, brakes lights, windows, interior light, speedometer, radio, heating control to not work.".....
While Ford has had many issues with MLPSs, this series of problems sounds like it's more likely caused by a failing ignition switch, also a fairly common issue with many Fords.
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Old 02-02-2010, 05:15 AM
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ive had the same issues with a taurus with a bad alternator.
as far as replacing the MLPS on a ford, the only 1 that needed to have the connector switched out was for pre-95 E4OD's .
the best thing to do is take a scanner that has a live datastream on it and verify the switch's operation.
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Old 02-02-2010, 05:15 AM
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sorry, double post

Last edited by tnsmith10; 02-03-2010 at 05:34 AM. Reason: double post
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