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david craig
david craig,
Category: Buick
Satisfied Customers: 3136
Experience:  owner/mechanic at 3D Automotive
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95 buick lasabre Remooved raidio re installed now motor

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95 buick lasabre Remooved raidio re installed now motor turns over wnats to start but won't run
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: yes batery is fresh charged also
JA: Are you fixing your LeSabre yourself? What have you tried so far?
Customer: Fixing myself just bought car charged the battery is all i've done
JA: Anything else you want the mechanic to know before I connect you?
Customer: The car ran fine before the radio was removed and reinstalled
Customer: replied 8 months ago.
I think the anti theft has been activated however the seurity light is not blinking but it seems like the injectors are cutting out

Hi Im David, did you install an aftermarket stereo system?

Customer: replied 8 months ago.
No prior owner tried then car wouldnt start so he re installed the original radio car stil wouldnt start

he probably spliced into the k line from the DLC connector, which is going to need repaired to be able to start it.

you have a meter?

Customer: replied 8 months ago.

oh crap, this is an obd1.5 huh?

Customer: replied 8 months ago.
Not sure but i think that is correct

when you crank the vehicle does the security light go out?.

Customer: replied 8 months ago.

ok, then its not a security issue. when you crank it are you getting rpms?

Customer: replied 8 months ago.
but it acts like its running for 1/2 a sec but then nothing

ok, well at least we know its not the crank sensor

when you turn the key to the run position can you hear the fuel pump running for a couple seconds

any update?

Customer: replied 8 months ago.
the fuel pump works

and it ran before you removed the radio?

Customer: replied 8 months ago.
Customer: replied 8 months ago.
thinking about taking radio out and checking that it was re installed correctly also ran the battery down so recharging it now .is it possible a fuse of some type might be blown? also not really sure we should rule out a security problem

did you have to cut any wires?

its possible for a fuse to go.

Customer: replied 8 months ago.
i didnt do the radio thing it was the guy before me

great..... you're going to have to look down in there for any cut wires.

Customer: replied 8 months ago.
Wont be able to until tomorrow cars in the street and its dark (married) will check for cut wires and blown fuses then

ok. cool. keep me posted ill send you a print of the radio wiring in a bit

Customer: replied 8 months ago.


1995 Buick LeSabre Stock Radio Wiring Diagram

Car Radio Constant 12V+ Wire: Orange
Car Radio Ignition Switched 12V+ Wire: Yellow
Car Radio Ground Wire: Black/White
Stereo Radio Illumination Wire: Gray/Black
Stereo Radio Dimmer Wire: Brown/White
Stereo Radio Antenna Trigger Wire: Dark Green
Stereo Radio Amplifier Trigger Wire: N/A
Front Speakers Size: 5 1/4″ Speakers
Front Speakers Location: Doors
Left Front Speaker Wire (+): Tan
Left Front Speaker Wire (-): Gray
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Dark Green
Rear Speakers Size: 6″ x 9″ Speakers
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Brown
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Dark Blue
Right Rear Speaker Wire (-): Light Blue

Customer: replied 8 months ago.
Pulled the radio today every thing looks oem no cut wires no blown fuses found a resistor bypass installed for the ignition switch measured the resistance it matches the resistence in the key Thinking the security control box may be the problem
wondering if the resistor bypass may have fouled the control box up any thoughts?

so they bypassed the immobilizer?

Customer: replied 8 months ago.

if the stock radio is back in the car, then it needs to go back to stock wiring. remove that damn bypass.

what color wire is the resistor on?

Customer: replied 8 months ago.
White wires in orange insulation coming from the ignition

The brain of the PASS-Key II system is a special decoder module that reads the pellet resistance through the lock cylinder contacts. It then compares
this key code with its own internal code.
If the codes match, the decoder supplies a ground for the starter enable relay and modulates a 5 volt reference signal (at 2.5 volts) from the ECM or
PCM which will then pulse the fuel injectors.
If the codes do not match, the decoder module sets its internal timer which locks out starter operation and fuel enable for up to three minutes

orange would be battery positive

Customer: replied 8 months ago.
what do you mean by battery positive?

if the bypass resistor was spliced into the orange wire, that orange wire from the ignition switch goes to the battery for 12vdc operating power

Customer: replied 8 months ago.
by puting a bypass resistor in line that means that circuit is powered up all the time right? will it eventually over power the controll box? if i take the bypass out and reconnect correctlly do you think this my solve the problem? Yeah i'm full of Q's but I really appreciate your great insight .

if you wire it up as it used to be with the stock radio by removing the bypass resistor, it should go back to how its supposed to work, as long as that frickin resistor didnt screw up the decoder.

Customer: replied 8 months ago.
I'll give it a try and keep fingers crossed. If the decoder is screwed what's the process then? is it worth the fix on a 250$ car

the fix would be to make sure the decoder resistance matches the key. which it should since its stock. i hate when people instaqll aftermarket bullshit. it screws up the original operation of the vehicles electronics and leaves headaches like this.

Customer: replied 8 months ago.
Thanks i'm going to try to get this done tomorrow I'll let you know how it turns out.

appreciate it. good luck

any luck?

Customer: replied 8 months ago.
David reconnected white wires back where they belonged now security light flashes and the motor won't even turnover just noticed the key i'm using is new no wear on it hope whoever made the new key use the right blank.
Customer: replied 8 months ago.
Is there a way to reset the security system?

lets try this. turn the key to the run position. light should flash. wait until it goes steady. should be approximately 10 minutes. turn key off. turn key back to the run position. let the light flash until it stops and stays on steady. turn key off. turn key back to run. wait til light stays on steady. turn key off, then start the car.

Customer: replied 8 months ago.
Will give it a try!

let me know

Customer: replied 8 months ago.
Sure will


Customer: replied 8 months ago.
Light continues to flash does not go steady on after 10-12 min

ok. let me see what else we can try

cut the wires from B7 and B8 back about 3 inches from the vats module and solder in the bypass resistor ....doing the the soldering under the glove box. you have to take those wires out of the system, meaning cut them clean out. No temporary jumping or anything. The module has to see that resistance +/- 100 ohms, I think. Don't forget to cap and stow those two wires that are left hanging.

Customer: replied 8 months ago.
Are wires B7 and B8 marked as such on each wire or do I need a schematic

ill get you the print

Customer: replied 8 months ago.

the connector is the top left one. just follow the B column down to locations 7 and 8

Customer: replied 8 months ago.
Won't be able to do this until tomorrow after 5 so bear with me.

no problem

Customer: replied 8 months ago.
Okay so resistor soldered in b7-b8 security light not on however we're back to motor runs fora second then injectors cutout

check fuse 7

Customer: replied 8 months ago.
Is this in the fuse block on the drivers side or am I lookin in the wrong place?

it should say fuel control

Customer: replied 8 months ago.
Well I've checked every fuse under the dash left side and right none blown anywhere

what about in the engine compartment?

Customer: replied 8 months ago.
Nothing blown in the engine compartment

you need a computer.

Customer: replied 8 months ago.
Computer as in decoder or pcm


Customer: replied 8 months ago.
is this a plug and play type situation or will a new pcm need to be programed?

on a 95, as long as the part numbers are exact. it should be plug n play.

Customer: replied 8 months ago.
Well I guess I'll see what i can find and give it a try any advice on where to pick one up?


any update?

Customer: replied 8 months ago.
None to date.


Customer: replied 7 months ago.
Dave put in new pcm runs like a charm.

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