20 Most Recent 1994 Buick Roadmaster Questions & Answers


On this website you find fuse box diagram and description for Buick Roadmaster (1994)

Buick Roadmaster 1994 fuse box diagram CARKNOWLEDGE

1994 Buick... | Answered on Oct 25, 2018


Sounds like you need a garage that knows about your vehicle and not just to guess.

1994 Buick... | Answered on Feb 14, 2018


I am truly stumped!! Help!!! ???? It's not that difficult if you know how to test electrical circuit's using a wiring diagram an a DVOM - digital volt ohm meter . Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter vehicle info. year , make , model . under system click on engine ,then under subsystem click on charging system . Click the search button ,then the blue link . Looking at the diagram on the left , i see the ignition switch ,the crank fuse in the I/P fuse box, the theft deterrent relay an the starter solenoid . Using a voltmeter or test light check for B+ voltage at the S terminal on the solenoid while someone tries to start the vehicle . If no light or B+ voltage ,back track to the relay , Test for B+ voltage at pin's 30 & 87 while cranking . If you pull the relay out of it's socket an look on the bottom or side you will see four set's of numbers 30 & 87 and 85 & 86 . You could just take a piece of wire ,heavy gage 12 . Jump 30 & 87 . If the heavy gage battery cable to the starter is good it should crank the engine .
Starter Voltage Drop
How to Diagnose No Crank No Start Issue Nothing or only Click When the Key...

1994 Buick... | Answered on Dec 27, 2017


Steve, go to buickforums.com. They have a roadmaster section with a lot of dedicated roadies, some are fanatics in their loyalty to those Buicks. I believe there are a good amount of sharp people on everything Roadmaster. They should know all the ins and outs of that code 84 and what to do about it. Joining is free to register.

Now personally, I don't think a reflash can be done on a '94 model, that is still OBD-1, but I cannot speak with certainty.

1994 Buick... | Answered on May 18, 2017


Has anyone tested the new temp unit to make sure it's functioning properly? Or is their possibly a mechanical thermostat in it that's hung and needs to be replaced?

1994 Buick... | Answered on Apr 28, 2017


First you want to know if your ignition system is working, so have you checked for spark?
If the answer is no, go to a parts store and buy a calibrated spark tester, real simple and inexpensive. Hook it up to one of your spark plug wires, crank the engine over with the key (as if you were starting it) and see if you get a strong blue spark. You will need a helper to turn the key while you watch for spark on the tester. If you have good spark, you can assume the ignition system is working good, so that's not the problem, nor is the cam sensor a problem. If you have spark and still no start, it likely is a fueling problem- see if fuel pump is turning on, check injector circuit-things to do with the fuel.
If you find no spark when cranking, something in the ignition system is the problem. Not necessarily the cam sensor- that sensor is for the computer to synchronize fuel injector timing with the intake valves opening. For the computer to determine spark timing and advance, it uses the crankshaft position sensor. So that sensor is more tied with the ignition system, and is often at fault when spark is lost. Other things, too, like the ignition control module, but those are things to check when troubleshooting the ignition. A repair manual should have a troubleshooting flow chart, or at least some steps or procedure when troubleshooting the ignition. Good luck.

1994 Buick... | Answered on Mar 10, 2017


What fault codes are showing up on the fault code test? If you haven't done that test do it, here is how it is done. Link below. FAQ How to read older GM codes for free

1994 Buick... | Answered on Jan 24, 2017


Do a fault code test, I will attach the link to instructions. FAQ How to read older GM codes for free

1994 Buick... | Answered on Jan 13, 2017


No reset for these. Replace the sensor or fix the wiring.

1994 Buick... | Answered on Dec 24, 2016


Into the throttle plate , Look at round black rubber tube from air filter box over to the engine ! Use a screw driver , loosen the clamp and pull the hose off the engine , where it fastens is call throttle body . Look inside you'll see a round disk or plate what ever you want to call it . Have someone step on the gas pedal and hold it down , you will see the plate open . This is where you spary the starter fluid ! After spraying some fluid in have the person holding the gas pedal down , release it . Then try to start the vehicle .

1994 Buick... | Answered on Dec 10, 2016


Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
Best Manuals

1994 Buick... | Answered on Oct 19, 2016


Theft-deterrent relay or module . Do you B+ voltage at the 10amp crank fuse in the I/P fuse block . Go to http://www.bbbind.com/free_tsb.html an see what all is involved in the starting circuit . Go to you tube an watch a few videos on basic electrical trouble shooting .

1994 Buick... | Answered on Feb 13, 2016


if you drive at 40 to 45 dose it shake all the time or dose it go away ?

1994 Buick... | Answered on Apr 28, 2015


Sounds like your sucking in some air through the fuel but try this first...new plugs and wires, distributer, fuel filter and air filter... total cost should be under 200 if you do it your self.... and it isn't rocket science but it sure sounds like your sucking air....

1994 Buick... | Answered on Apr 27, 2015


There is a sensor in the key lock that reads the chip in your key.
If the sensor fails or the chip fails the light will come on and the car should not start.

1994 Buick... | Answered on Mar 18, 2015


this is indicative of a faulty ignition switch or ignition circuit.
When you have it in the start position the power is divided between the coil and the starter motor. hence it starts
when you let the key go to the run position the power is stopped to the starter but a new circuit is opened to the coil hence providing power to the coil for the engine to keep running. There is a resistance wire to the coil that lowers the voltage for running. Your problem will be in that run circuit if not in the ignition switch

1994 Buick... | Answered on Mar 09, 2015


does it have level ride, if so its a level ride compressor,

1994 Buick... | Answered on Feb 24, 2015

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