Not sure what this fuse/wire powers on my 1970 Oldsmobile 98 with the 455 Rocket engine. The wire is black with an ochre/yellow stripe on it. I don’t know if I broke the fuse or whether it’s been broken for a while. I have a few electrical issues in the interior. Door lights, fuel gauge, clock, cigarette lighters all not working. I have been studying the wiring diagrams and can’t figure it out. Hoping anyone recognizes this fuse. Thanks Trent

 

That's the fuse for the high speed blower relay for your A/C. Should be a 30A fuse. FYI, the wiring diagram for the A/C is in Chapter 1B of the Chassis Service Manual.

 

Thanks Joe, I really appreciate this.

Trent

 

Looks like the contacts from the old broken fuse are still stuck in the holder sockets, pull those out before inserting a new fuse.

Also, SWEET '98, please post some pictures in the New Members section. I remember spending many hours riding around in my HS friend's dad's '70 '98 Holiday sedan. Always loved the vanity mirror in the back seat (it had a bench front seat).

 

Thanks for the information Johnny, I’ll be sure to post some pictures on the New Members section. My wife learned to drive on this car back in the early 80’s... it’s been in her family since day 1... 1970.
For now here’s a picture from the front.

 

If the contacts have melted or burnt enough to prevent solid connection, and 100% original isn’t important, find a cooling fan connector from a later model GM car. Those accept ATO style fuses. If you search some other GM cars, you can also find the weather resistant mounting cap.

They look like this. You can probably find this fuse holder in several places under hood. I suggested the cooling fan because that will have 10-12 gauge wire, and if you take the time to unwrap the harness you can probably get enough wire to reach to both the blower relay, and the horn relay, eliminating the need for splicing wires. Blower motors can pull some serious current. A small amount of resistance from a poor connection will cause the wiring to get hot, leading to melted parts.

 

It wouldn’t be a bad idea to remove the blower motor to inspect the squirrel cage. If there is any resistance or noise turning the fan, replace the motor. If the motor is noisy or doesn’t turn freely, that will lead to burnt wiring.

 

Thanks for the suggestions Matt, I’ll update this post once I complete the job and let you know how it went.