One problem related to underhood wiring has been reported for the 1998 Volvo 770. The most recently reported issues are listed below.
Consumer states multiple alignments have been performed on the truck due to vibration, the front and rear u-bolts are inoperative, a broken spring was replaced. The vehicle has also experienced dash wiring harness problems and water leaks from the top of the window.
| Dash Wiring problems | |
| Electrical System problems | |
| Starter problems | |
| Underhood Wiring problems |