| Author | Message | ||
     Dennis Buchholz Yet to post message Username: bariman Post Number: 1 Registered: 09-2022 |
Please help. I jump started my 88 Silver Spur and ever since I have been blowing the 10 amp fuse (B4) that covers the fuel gauge, temp gauge, oil pressure gauge and brake pressure lights. I have disconnected everything I can find on this circuit but it still blows the fuse. Something is shorted to ground but I can't find it. Has this happened to anybody else? I am at the end of my rope. | ||
| michael vass Frequent User Username: mikebentleyturbo2 Post Number: 764 Registered: 07-2015 |
How many times do I have to say NEVER jump start one of these era cars? I'm guessing you have melted the instruments voltage regulator. Mike | ||
| Cliff Biggs Experienced User Username: cliffy Post Number: 74 Registered: 09-2021 |
That fuse also powers the parking brake light the coolant level amplifier, the washer fluid amplifier low fuel warning lamp and buzzer | ||
| Dennis Buchholz New User Username: bariman Post Number: 2 Registered: 09-2022 |
Thanks for the help. This is my first experience with this type of car and I didn't know about the no jumping rule. These lessons can get expensive. I have located the short, which is in the buzzer for the seatbelts (picture attached). Now I find that the fuel gauge reads empty, the oil pressure and oil level gauges read high when the engine is off and zero when the engine is running. Where is the instrument voltage regulator and what does it look like? | ||
| Robert J. Sprauer Frequent User Username: wraithman Post Number: 800 Registered: 11-2017 |
There is no specific "voltage regulator" for the instruments. The VR is after the alternator so everything is regulated. I would read the workshop manual for your car. You will find answers within. https://rrtechnical.info/sz/05_sz.html . | ||
| Cliff Biggs Experienced User Username: cliffy Post Number: 77 Registered: 09-2021 |
Also look for shorted relays. I had fuse B3 popping and traced it to a shorted relay by swapping a good new relay for each relay one at a time. For testing you can pull one of the wiper relays and begin swapping one at a time. You might also have blown or shorted diodes on the diode board that might be attached to the Fan Speed Module underneath the steering wheel knee roll. Sorting out electrical issues on these is challenging |
