[Greg Owens]

On the factory fuse panel of my ‘69 there are spade terminals for Ignition, Accessory and Battery. There is not a fuse in the panel with a similar label so my question is are these circuits fuse protected somehow?

 

[modern malibu]

No, these terminals are not fused. If adding an additional device, use the correct size fuse in the wire to the load to handle the current draw.

 

[Coppertop]

Oh course these are fused!

Each spade lug is protected by a circuit fuse.

For example, the IGN spade lug is protected by the turn signal fuse.

GM would never let add-ones be unfused.

 

[Jim Streib]

While the below is on a 67 Chevelle, even the spade terminals on the newer fuse blocks for the 69 are also fuse protected. These "taps" as I call them are for adding accessories like rear defroster, cruise control, and other things. You just have to do the math to figure out how much power is available and what can be pulled out of these "taps". In other words if one of the "taps" is protected by a 20A fuse and that circuit is already pulling 10A, then the most you can pull out additionally would be 10A. Anything more will require a different circuit design.

You will also notice too that the newer fuse blocks are also keyed to mate up with the correct plug so that when a factory accessory was added it could not be plugged into the wrong spot.

Below are some plugs for factory accessories (Notice they include another connector to where more than one accessory can be plugged in and daisy chained off of the one spot from the fuse block):

Cruise Control Ignition 12V Fuse Block Plug:

Cruise Control Lighting 12V Fuse Block Plug:

Rear Defroster Accessory 12V Fuse Block Plug:

Jim

 

[modern malibu]

I stand corrected. Must be getting old. Seems counter intuitive to have the bus wired to include add on circuits through an existing fuse as this would allow anyone to add as many accessories to the circuit by simply adding a bigger fuse, but pictures don't lie. I apologize for submitting the wrong information. By today's standards this would never fly.

 

[Pioneer4x4]

While the below is on a 67 Chevelle, even the spade terminals on the newer fuse blocks for the 69 are also fuse protected. These "taps" as I call them are for adding accessories like rear defroster, cruise control, and other things. You just have to do the math to figure out how much power is available and what can be pulled out of these "taps". In other words if one of the "taps" is protected by a 20A fuse and that circuit is already pulling 10A, then the most you can pull out additionally would be 10A. Anything more will require a different circuit design.



You will also notice too that the newer fuse blocks are also keyed to mate up with the correct plug so that when a factory accessory was added it could not be plugged into the wrong spot.

Below are some plugs for factory accessories (Notice they include another connector to where more than one accessory can be plugged in and daisy chained off of the one spot from the fuse block):

Cruise Control Ignition 12V Fuse Block Plug:


Cruise Control Lighting 12V Fuse Block Plug:


Rear Defroster Accessory 12V Fuse Block Plug:


Jim

Thanks, this is great info, I didn't know about the factory accessory harness keying.

 

[Greg Owens]

Thanks everyone! I thought surely they were fused but wasnt sure how. Didnt know if they relied on fusible link or something. I just had a meltdown in the internal wiring of an EFI system i am installing so now im curious/worried about a defective unit burning the car down.

Interesting thing is no fuse popped. Even the built in fuse in the EFI wiring harnes. Just melted a few wires. I guess i was quick enough turning the key off.

 

[ZZ69chevelle]

I wouldn't run the circuit at capacity either unless you feel like changing fuses all the time.

 

[Haloed]

While the below is on a 67 Chevelle, even the spade terminals on the newer fuse blocks for the 69 are also fuse protected. These "taps" as I call them are for adding accessories like rear defroster, cruise control, and other things. You just have to do the math to figure out how much power is available and what can be pulled out of these "taps". In other words if one of the "taps" is protected by a 20A fuse and that circuit is already pulling 10A, then the most you can pull out additionally would be 10A. Anything more will require a different circuit design.

You will also notice too that the newer fuse blocks are also keyed to mate up with the correct plug so that when a factory accessory was added it could not be plugged into the wrong spot.

Below are some plugs for factory accessories (Notice they include another connector to where more than one accessory can be plugged in and daisy chained off of the one spot from the fuse block):

Cruise Control Ignition 12V Fuse Block Plug:

Cruise Control Lighting 12V Fuse Block Plug:

Rear Defroster Accessory 12V Fuse Block Plug:

Jim

Anyone know where to purchase new B, D, F and or H fuse terminals?

 

[oldcutlass]

You don't need the keyed terminals if you're not doing a pure stock installation, all you need are 1/4 female spade crimp on type.

 

[Haloed]

You don't need the keyed terminals if you're not doing a pure stock installation, all you need are 1/4 female spade crimp on type.

Not sure what you mean. I am not looking to tap into an existing terminal if that is what you mean. I have an empty slot in my fuse box that I would like to utilize if I can find the terminal that connects to the fuse on one side and has two male spade terminals on the other...if that makes sense.

 

[DUTCH MAX HEADWORK]

Pico fuse block taps - Google Search

The black pico taps are for the batt tap terminal and the white pico is for the ignition tap terminal.

Looks like I missed the original request. I'll see if I can fins what you are looking for.

Fuse holder terminals that install in chevy fuse box.

 

[DUTCH MAX HEADWORK]

So far I can't find any like the originals.
Fuse Clips - Littelfuse


Littlefuse Schurter - 8-045 - Fuse Holder. Clips. Package of 20.

 

[oldcutlass]

Try these
Del Mar Wire & Products - Wholesale Automotive and Electrical Distributor

 

[Buzz-B]

Does anyone know which one of these terminals the factory cigarette lighter attaches to, or if power from the lighter goes direct to the battery with an inline fuse?

 

[Jim Streib]

On a 67, and if it's a factory installed lighter, then the lighter is not tied to any fuse in the underdash fuse block.

Jim