Volvo 780

If the alarm on a 1987 Volvo 780 continues to sound even after pulling the fuse, it may be due to a malfunctioning alarm system or a stuck relay that keeps the alarm activated. Additionally, some alarm systems have backup battery power that can keep them running independently of the vehicle's main power source. It’s also possible that a wiring issue or a fault in the alarm’s control module is causing the problem. To resolve the issue, you may need to consult the vehicle's manual or have a professional examine the alarm system.

On a 1990 Volvo 780, the bulb failure relay is typically located behind the dashboard, near the driver's side. It is often found in the relay panel, which is accessible by removing the cover beneath the steering column. If you have trouble locating it, consulting the vehicle’s service manual can provide specific details and diagrams for your model.

Volvo fault code MID 128 PID 131 FMI 4 typically indicates a problem with the accelerator pedal position sensor or its circuit. Since you've already replaced the accelerator pedal kit, the issue may lie in the wiring or connectors associated with the sensor, or there could be a problem with the engine control unit (ECU). Additionally, ensure that there are no vacuum leaks or other related sensor issues that could affect throttle response. It's advisable to perform a thorough inspection of the wiring and connections, and possibly run diagnostics to pinpoint the exact cause.

The wheelbase length for a Volvo 780 is approximately 2,600 mm (102.4 inches). This measurement contributes to the car's stability and handling characteristics, which are notable in this luxury coupe model produced during the late 1980s and early 1990s.

The fault code MID 137 for Volvo trucks typically refers to an issue with the communication between the engine control module (ECM) and the brake control module (BCM). This code indicates a problem with the J1939 data link, which is the communication network used by various modules in the vehicle. To diagnose and resolve this issue, technicians would need to perform a thorough inspection of the wiring, connectors, and components involved in the J1939 network, as well as potentially update software or replace faulty modules.

Really depends on year, engine, and what you're using it for. For a freight hauler running just a five axle unit, if you were to get a brand new one with the ISX, the engines of 450 horsepower or less for 2014 have their power band from 1250 to 1350 RPMs, so you might want to consider something like 3.36 rears with a .73 or .74 overdrive transmission, or possibly 2.93 or 2.85 rears with a .86 or .87 overdrive transmission. Then, there's always the I-Shift option, which is available only with a Volvo engine and comes with either a .9 overdrive ratio or a 1:1 direct drive ratio... If it were me, I'd probably go with the .9 and 2.64s, and just not use the big hole unless I was empty or loaded really light. But you should really talk to a Volvo rep about how to spec your truck... I wouldn't be the be-all, end-all source for that info... Volvo trucks aren't made for the lines of work I've been in.. they're aimed at freight haulers.

If you have the double bunk sleeper, it should come up to about 12'6".

You'd have to contact Volvo customer service for this. IIRC, there were a couple different options for the 730 and 780.

Any Volvo dealership, halfway decent truck stop, or - if a simple 12v cooler is sufficient (it was for me when I drove OTR), then you can find one easily enough at Wal Mart, Target, Best Buy, etc.

there are two old style fuses in line behind the fridge you must pull the fridge out of the cabinet to check them

Curb weight for a 780 is typically between 18,000 - 19,000 lbs.

Please go to this URL. I think 780 has the same relays and locations:

http://www.davebarton.com/pdf/relay_87_700.pdf

Igor.

Somewhere in the vicinity of 17,000 - 18,000 lbs.

To give an accurate answer, you have to give us an idea of how the truck is configured.. a 780 with standard 12k steer and 40k drive axles is going to differ greatly in weight than a heavy haul truck with, say, a 20k steer and 50k drive axles. The motor is going to affect weight, as well. The lightest motor will be the Volvo VE D 12, and the heaviest will be the Volvo VE D 16. In between those motors, there were several other motors available in various years - 12.7 litre 60 Series Detroit, Cummins M11, N14, and ISX, Caterpillar 3306, 3406, C12, C13, C15, and possibly the C16, etc...

Try seaking seal

It is the Volvo fuel injection relay . It provides the ground path for the fuel injectors.

According to info I found, Volvo 1323592-1 is used as a cooling fan relay and as a noise suppression relay.

15,000 to 18,000 lbs., depending on options.

20,000 pounds give or take some depending on fuel

mid 128 ,fmi 7

mechanical system not responding properly

16"

You'd be in the 18,000 lb. range.

Assuming you're referring to a Volvo VNL 780 truck, with the double bunk sleeper, 12'6".