Neutral safety switch replacement 740 wagon

  • Thread starter Thread starter MarkG
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MarkG

My starter won't start. Based on advice I've found in this group, I
think my 1992 740 wagon starter won't start because of a problem with
the neutral safety switch. By wiggling the gear shift in neutral as I
keep the key turned all the way clockwise, I've been able to start the
starter and the car. Once I turn the car off, the starter won't start.

My mechanic can't look at it until next week. Any quick fix until
then? The point at which the starter starts is very tricky. How
difficult is it to replace the switch (if it needs replacing)?

Thanks.

Marak
 
See here...
http://www.brickboard.com/FAQ/700-9....htm#StarterWillNotEngageStartInhibitorSwitch

Starter Will Not Engage: Start Inhibitor Switch.

[Symptoms: I have an 89 740GL that sometimes starts but sometimes does not.
When I turn the key the car simply will not turn over: no starter response
on key to "start". However, all of the panel lights, the battery level and
starter assembly are good. When this happens I usually put the car in
Neutral and then back in Park which usually works allowing the car to
start.]

[Response:] If your car is an automatic, like my wagon, make sure that the
start inhibitor switch located under gear indication panel is not out of
adjustment. A simple test is to push the selector forward or back a little
in the P position (the only one the car should start in) as you turn the
key. If the car starts, crawl under and adjust the rod just a little and the
problem should be solved once and for all. Failing this option, check the
switch and wires associated with the lockout switch.

[Response: JohnB] Took about 250K and 16 years, but there it was: a
potential pattern failure at the start inhibitor (neutral safety) switch. A
nice square contact (should be rounded and smooth--the other one was) point
due to wear and a relaxed copper alloy arm...the car wouldn't start unless
the switch was compressed by hand (a get-home crutch, BTW!). And
beware...the Volvo part comes with a new and cheaper connector that the
dealer crutches by selling you four terminals and the late model socket for
an additional $5.00!! You're supposed to clip the OEM chassis harness clip
off and crimp the new male spade terminals on and install the late model
socket so the new NSS can plug into it...I just used the old socket and
spliced it onto the new NSS. This same NSS is used on the 9xx series....
 
See here...http://www.brickboard.com/FAQ/700-900/ElectricalStarting.htm#StarterW...

Starter Will Not Engage: Start Inhibitor Switch.

[Symptoms: I have an 89 740GL that sometimes starts but sometimes does not.
When I turn the key the car simply will not turn over: no starter response
on key to "start". However, all of the panel lights, the battery level and
starter assembly are good. When this happens I usually put the car in
Neutral and then back in Park which usually works allowing the car to
start.]

[Response:] If your car is an automatic, like my wagon, make sure that the
start inhibitor switch located under gear indication panel is not out of
adjustment. A simple test is to push the selector forward or back a little
in the P position (the only one the car should start in) as you turn the
key. If the car starts, crawl under and adjust the rod just a little and the
problem should be solved once and for all. Failing this option, check the
switch and wires associated with the lockout switch.

[Response: JohnB] Took about 250K and 16 years, but there it was: a
potential pattern failure at the start inhibitor (neutral safety) switch. A
nice square contact (should be rounded and smooth--the other one was) point
due to wear and a relaxed copper alloy arm...the car wouldn't start unless
the switch was compressed by hand (a get-home crutch, BTW!). And
beware...the Volvo part comes with a new and cheaper connector that the
dealer crutches by selling you four terminals and the late model socket for
an additional $5.00!! You're supposed to clip the OEM chassis harness clip
off and crimp the new male spade terminals on and install the late model
socket so the new NSS can plug into it...I just used the old socket and
spliced it onto the new NSS. This same NSS is used on the 9xx series....


My starter won't start. Based on advice I've found in this group, I
think my 1992 740 wagon starter won't start because of a problem with
the neutral safety switch. By wiggling the gear shift in neutral as I
keep the key turned all the way clockwise, I've been able to start the
starter and the car. Once I turn the car off, the starter won't start.
Click to expand...
My mechanic can't look at it until next week. Any quick fix until
then? The point at which the starter starts is very tricky. How
difficult is it to replace the switch (if it needs replacing)?

Mark
Click to expand...
Click to expand...

Thanks. Will need need to remove anything in order to be able to
access the rod from under the car?

Mark
 
MarkG said:
My starter won't start. Based on advice I've found in this group, I
think my 1992 740 wagon starter won't start because of a problem with
the neutral safety switch. By wiggling the gear shift in neutral as I
keep the key turned all the way clockwise, I've been able to start the
starter and the car. Once I turn the car off, the starter won't start.

My mechanic can't look at it until next week. Any quick fix until
then? The point at which the starter starts is very tricky. How
difficult is it to replace the switch (if it needs replacing)?

Thanks.

Marak
Click to expand...

You could bypass it, the manual transmission cars came with a jumper plug to
do just that.
 
You could bypass it, the manual transmission cars came with a jumper plug to
do just that.
Click to expand...

He fixed it by replacing the neutral safety switch. Thanks for the
help.

Mark
 
by all means by pass it but remember do not leave it in gear if you try to
start from under the hood .I did once trying to get to a doctor urgently but
pinned my self with the car and rocks instead as the car flew forward .
 
John Robertson said:
by all means by pass it but remember do not leave it in gear if you try to
start from under the hood .I did once trying to get to a doctor urgently
but pinned my self with the car and rocks instead as the car flew forward
.
Click to expand...


Yes it's definitely something to watch out for. Normally I would never
suggest bypassing something like that, but the manual transmission cars
never had a safety switch in the first place, something I've found odd, but
it's come in handy on a couple occasions to get the car out of the way when
my fuel pump failed and another time when the ignition power stage failed.
 
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