If your 1989 Volvo 740 GL won't crank, first check the battery to ensure it's fully charged and the terminals are clean and tight. Next, inspect the starter motor and its connections, as well as the ignition switch and fuses for any issues. Additionally, consider the neutral safety switch if the vehicle is automatic, as it may prevent the car from cranking if faulty. If these components are in good condition, further diagnostics may be needed to identify the problem.
In the 1989 Volvo 740 GL with a Bosch system it is located just above the steering column on the dash.
Not necessarily, most do however.
under the left hand bumper
behind the fuses, below the radio, behind the lowest box in front of the shifter.
i have a 1989 740 and mine is located on under the hood it the green 1 on the side next to the air filter
Fuel pump relay or Knock sensor if stall after maybe 2 miles
2
To determine if a relay in a 1989 Volvo 740 GL is bad, you can perform a few checks. First, listen for clicking sounds when the relay is activated; no sound may indicate a problem. Additionally, test the relay with a multimeter for continuity or swap it with a known good relay to see if the issue resolves. Lastly, inspect for any signs of physical damage, corrosion, or burnt contacts.
There are several things that can cause your 1990 Volvo 740 to stall while driving. The most common cause is a bad fuel pump.
Try overdrive relay, you can buy them anywhere, replace old one, it is very easy.. I had to replace one on my 88 740. Give it a shot before you let someone work on it.
change the overdrive sensor should be on the left side of the gear box.
Yes. However it's not that easy due to the turbo versions electronics (if it's a 700 series turbo your after). But fully possible and has been done several times.