Question about Buick Roadmaster

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Buick no start condition 1996 model road master i check power from solinoid engine key crank position no power to solinoid used wire to bypass sollinoid start a few second, main terminal solinoid to positive battery bypass ok start. check power to ignition key key crank position no power coming out to wire bypass redwire to white wire no power main solinoid terminal to baettery terminal ok and why when we bypass solinoid starter to baettery engine start then off the engine afew second

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Hello! Since there isn't power (+12V) coming out of the crank position one of two faults is the problem...#1...There is a 10A "crank fuse" located in the inside fuse box (for vehicles equipped w/anti-theft)...If fuse is OK then...#2...Defective ignition switch...When you bypass the solenoid and the engine starts you have tested the solenoid and the starter motor...They are OK...Engine will not keep running because there isn't a hold path through the ignition switch
(a normal condition)...

Bottom line...If crank fuse is ok (or not equipped) the solution is to replace the ignition switch...It is defective...

Guru...Saailer

Posted on Sep 16, 2010

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06 buick lucerne wonr crank key wont turn to off position shifter stuck in park


Define won't crank ? I'am assuming the key will turn to the start position ! When doing so does the starter spin the engine or not ? Trying to define your problem of won't crank . If when you turn the key to start position an the starter spins the engine over but doesn't start an run , this is a cranks no start condition . If nothing happens when you turn the key to start , this is a no crank no start condition . Your vehicle has a safety system , shift interlock , won't let it shift out of park if the brake pedal isn't pressed . Won't let the key turn off either . Electronics involved , locking solenoid's etc.... Floor or column shift ?
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
• The automatic transmission shift lock solenoid (serviced as the automatic transmission shift lock actuator), as well as the body control module (BCM) and the engine control module (ECM)/powertrain control module (PCM). The shift lock solenoid is located within the floor shift control assembly with vehicles equipped with floor shift.
• The BCM controls the voltage supply circuit of the shift lock control solenoid. The following conditions must be before the BCM will supply voltage to the shift lock control solenoid.
The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will supply voltage to the shift lock solenoid:
• The ignition is in the ON position.
• The ECM/PCM sends an input via GMLAN serial data to the BCM indicating the transmission is in the PARK position.
• The BCM determines the brake pedal is applied according the brake pedal position.
Since the shift lock control solenoid is permanently grounded, the BCM supplies voltage to the automatic transmission shift lock control solenoid, mechanically unlocking the shift lever allowing the driver to move the shift lever out of the PARK position as the solenoid energizes. When the brake pedal is not applied, the BCM turns the control voltage output of the shift lock control solenoid OFF, de-energizing the shift lock control solenoid. The de-energized solenoid mechanically locks the shift lever in the PARK position.
During remote start operation, the BCM will de-energize the shift lock control circuit, locking the shift lever in the PARK position.

Plus the reverse lock out !
The reverse lockout system is a safety feature which prevents an inadvertent shift into reverse at speeds above 5 km/h (3 mph). The system consists of the following components:
• The engine control module (ECM)/powertrain control module (PCM)
• The reverse lockout solenoid
With the ignition ON, battery voltage is supplied directly to reverse lockout solenoid. At forward speeds above 5 km/h (3 mph), the ECM/PCM commands the reverse lockout solenoid ON by grounding the control circuit of the solenoid. This energizes the solenoid and mechanically prevents the shift lever from being moved into the REVERSE position. At forward speeds below 5 km/h (3 mph), the ECM/PCM commands the reverse lockout solenoid OFF, de-energizing the solenoid, which allows the shift lever to move into the REVERSE position.

Power Mode Master
This vehicles BCM functions as the power mode master (PMM). The ignition switch is a low current switch with multiple discrete ignition switch signals to the PMM for determination the power mode that will be sent over the serial data circuits to the other modules that need this information, and so the PMM will activate relays and other direct outputs of the PMM as needed. Refer to Power Mode Description and Operation for a complete description of power mode functions.
You have no clue of the electronics in your vehicle , your best bet have it towed to the Buick dealer .

Apr 08, 2017 | 2006 Buick Lucerne

1 Answer

95 Buick Regal will not crank when engine warm wait 20 or so minutes and it will crank what causes this issue.?


Define crank ? Does the engine spin when you turn the key to the start position ? This is referred to as engine cranks . now yours won't start an run ! This is a cranks no start condition ! When it won't start an run check for spark at a coil , your vehicle has three if a V-6 . Pull both plug wires off same coil an crank engine , is there spark ? Yes - No . No spark , ignition module could be bad , crankshaft position sensor , Your best bet would be to take your vehicle to a qualified repair shop .

Sep 26, 2016 | 1995 Buick Regal

1 Answer

My 1996 nissan quest gxe wont even power solinoid or starter when i turn key.dash lights come on only im positive its the factory security alarm.how can i reset it


this alarm system is reset with the key being turned in the door, lock and unlock the driverside door and then see if it starts if not then do the same to the pass/side and see if it starts if it doesnt then you may have a bad starter, the best thing to do is check for power at the small wire on the starter if theres power to the small wire with the key in the crank postion and there should be power on small wire if there is then replace the starter, hope this helps.

Dec 19, 2010 | 1996 Nissan Quest

1 Answer

Power at battery good. power to starte solenoid good, strater tested good. Wont turn over(start cranking)


Sounds like the solinoid is bad. The small wire going to the solinoid should have battery voltage going to it when the key is in the start position. If it does your solinoid is bad. If it doesent your key swith is bad or the wire going to the solinoid is cut somewher between the switch and the solinoid

Oct 29, 2010 | Chevrolet S 10 Cars & Trucks

3 Answers

My 1996 Dodge Caravan won't start. All lights will come on, but it will not turn over at all.


It sounds like a problem with your stater solinoid. If the starter hasnt been acting up recently and this is an all of a suddon thing, its probably the wire that activates the solinoid from the ignition. Depending on which motor you have you will probably need to jack the van up to get a look at the starter which will be on the front face of the engine under the exaust manifold. It is more likely to be a small wire that either slips on a flat metal tang, or has a small stud,nut connection. Once you can see it, gently move the wires around by the starter and look for a broken or pulled off wire. If you dont see one, pull the starter and have it tested. Hope this helps, Clay

Mar 26, 2010 | 1996 Dodge Caravan

1 Answer

1996 buick skylark..alarm theft keeps flashin..try to start..it turns but wont stay running..


Need a bit more information, Is the security light on, have you checked for spark and fuel pressure, just in case you did and know it is the passlock system then check this out, hopefully it will ansewer your problem, please rate your mechanics help.
have a great day. Sorry the pictures won't come up, but check out the site

GM Passlock I & II Information

Please study the following information carefully WHEN INSTALLING REMOTE START systems on a 1996 or later GM car or truck.
Introduced in 1996, GM has changed the VATS anti theft system to Pass-Lock system. This is a similar device to the VATS system, in that there is a resistor present during the start cycle. However, in the PASSLOCK system, the resistor has been placed inside the ignition switch, instead of the key. See the GM V.A.T.S page for more information.
To remotely start a car with this feature, you must bypass the PASSLOCK system. There are two methods of doing so.. The first, is to permanently bypass this system. This is the easiest method for accomplishing your task. The second way, is to temporarily bypass the PASSLOCK, by introducing relays into the system, which retain all of the features of the system, while allowing your remotes start module to bypass it automatically during a remote start cycle.
Vehicles effected
(1996 and newer): N & J body cars, such as
Pontiac Sunfire and GrandAm Passlock-1
Chevrolet Cavalier Passlock-1
Buick Skylark Passlock-1
Oldsmobile Achieva Passlock-1

1997 or newer
Chevrolet Malibu Passlock-II
Oldsmobile Cutlass Passlock-II

1998 or newer
All trucks , SUVs and Vans Passlock-II

It is important to pay special attention to the fact that there are many different ways of achieving the same goal. There are actually 2 different Passlock-II systems. On the next page, there are tests to establish which type of passlock-II your car has.

Relays shown are standard automotive 5 pin spdt relays, available from IEI.
A multi meter is required to measure the resistance values. Accuracy is important within 5%.

Once the value of the resistor is measured, a resistor of the same value +/-5% must be purchased (Radio Shack2.gif, for example). You can also use a Potentiometer (POT), which can be adjusted to the same value of the resistor in the ignition switch.

pslc1.gif Passlock-I bypass procedure....

1: Remove the top and bottom shrouds from the steering column.
2: Find the 3 wire ribbon cable2.gif, coming from the ignition switch, containing White, Black, Yellow (Sometimes White, Black, Black). These are THIN wires.
3: Locate the Black 6 position connector on the LEFT side of the steering column, right above the ignition switch position. There is a BLACK (Thin) wire in this connector, called "Bulb Test", which shows Ground with ignition in the Off position, OPEN in the "Run" position, and GROUND in the "Crank" position.
4: Turn the ignition switch to the "Run" position. Do not crank the car.
5: Cut the Thin Yellow wire and strip both ends.
6: Without cutting the Black wire, expose some of the copper.
7: Using the ohmmeter, measure from the Yellow wire (the end coming from the ignition switch), to the exposed Black wire and record the value. Measure more than once to assure you have the right value.
8: Acquire the same size resistor and 3 relays, and perform the connections shown in the diagram below.

pslk2.gif PASSLOCK-II bypass procedure

There are 2 types of Passlock-II systems. To determine which system you have, follow these instructions;

1: Locate two wires, which are THIN and are in the main ignition harness.. Orange/Black (or Black) and Yellow.
2: Cut the Yellow wire, and strip back some of the insulation from the Orange/Black (Or Black) wires.
3: Turn the ignition to the "Run" position ( don't crank the starter). Measure and record the value measured from the KEY SIDE of the Yellow wire, to the Black/Orange wire.
4: Turn the key to the "Crank" position and release. Now read the value again.
pslk3.gif5: If the value changed, follow "Method#1". If the value stayed the same, follow "Method#2".



These diagrams are from our friends at ALARMTEK AUTO ALARM
Need additional assistance?

Oct 22, 2009 | 1996 Buick Skylark

1 Answer

89 cougar cranks when key is off


There are 2 connections on the solinoid the main positive feed.(thick wire from battery)which will sometimes have other wires connected with it and a thinner wire(approx. 3mm thick) with a push on lug from the ignition relay.Check that none of those wires are in the wrong place.it will cause what you are describing

Jul 31, 2009 | 1989 Mercury Cougar

1 Answer

1996 buick won't start


Try having someone turn the key to the start position while at the same time someone else taps on the starter with a hammer. If starter begins to crank the engine or makes weird noises or begins to smoke then you need a starter. If nothing happens, then using a test light or a volt meter check for power at the "S" terminal of the starter solinoid when the key is turned to the start position. The "S" terminal is the small terminal to the right of the terminal where the battery cable goes when viewed with the battery cable terminal at the 12 Oclock position. (usually a purple wire). Hope this helps.

May 07, 2009 | 1996 Buick Skylark

1 Answer

Starter wont engage


The problem is either the starter solinoid (located on fender near battery) or you are not getting power to the "s" terminal on the starter solinoid from the ignition switch. If you follow the positive battery cable from the battery you'll follow it to the solinoid. Remove the small wire from the terminal marked "s" on the solinoid and using a screwdriver jump from "s" terminal (not the wire) to where positive battery cable connects to solinoid. (with battery connected). If starter doesn't do anything the solinoid is bad. If starter cranks then you are not getting voltage from ignition switch through "s" terminal wire.

Feb 19, 2009 | 1997 Ford F150 Regular Cab

1 Answer

1996 LeSabre Engine will not crank over


This fix was for a 1996 Buick LeSabre.
I found the key reader in the ignition switch was faulty.
Made up a resistor pack to match the key resistance, cut the orange wire which comes out of the steering coloumn (it contains two white wires) from the reader to the VATS module and soldered it into the two white wires going into the VATS module.
This bypasses the security system so now any properly cut key will start the car.

Dec 05, 2008 | 1996 Buick Riviera

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