When adding electric mods to your CB Accord one can fill up the accessory plugs on the under dash fuse box pretty quick. Adding wires can also get messy the more mods you’re adding. If you’ve read my MRT, chances are you’ll understand what I mean.
Adding DRLs, automatic headlights, making your own fog light harness, power & heated seats etc. all can be done using the correct and often readily open ports on both fuse boxes. This will save you from filling up the (4 only) accessory ports after just a couple mods.
This is the key to the unassigned but useable ports our under dash fuse box:
The image below shows the ports, plus more good information to know about your CB under dash fuse box.
The ports I will be referencing are marked with colored X’s
Red=C751
Blue=C407
Yellow=C408
Green=C502
All the other plugs are not useable as far as adding to them.
C751:
Pin#15 - power from defog relay. I think this can be used for heated mirrors. I’ll be doing some testing to prove that soon.
C407:
Pin#3 - power from fuse 10. Fuse 10 is an unused fuse and is for (daylights) or DRL’s.
Pin#9 - distributor power signal/ tach.
Pin#12 - is open but has no pin and is not useable.
Pin#15 - this pin is tied into the cluster power wire (yel) it’s a
good power pin.
C408:
Pin#6 - is open but has no pin and is not useable.
Pin#7 - power from cruise control fuse.
Pin#8 - is open but has no pin and is not useable.
Pin#11 - power from fuse 10. (Daylights) fuse or DRL
Pin#13 - is open but has no pin and is not useable.
Pin#14 - is open but has no pin and is not useable.
C502:
Pin#2 - power from fuse 1 (back up, meter, turn signals)
Pin#4 - is open but has no pin and is not useable.
Pin#7 - power from directional signals
Pin#8 - is open but has no pin and is not useable.
Pin#9 - is open but has no pin and is not useable.
Adding DRLs, automatic headlights, making your own fog light harness, power & heated seats etc. all can be done using the correct and often readily open ports on both fuse boxes. This will save you from filling up the (4 only) accessory ports after just a couple mods.
This is the key to the unassigned but useable ports our under dash fuse box:
The image below shows the ports, plus more good information to know about your CB under dash fuse box.
The ports I will be referencing are marked with colored X’s
Red=C751
Blue=C407
Yellow=C408
Green=C502
All the other plugs are not useable as far as adding to them.
C751:
Pin#15 - power from defog relay. I think this can be used for heated mirrors. I’ll be doing some testing to prove that soon.
C407:
Pin#3 - power from fuse 10. Fuse 10 is an unused fuse and is for (daylights) or DRL’s.
Pin#9 - distributor power signal/ tach.
Pin#12 - is open but has no pin and is not useable.
Pin#15 - this pin is tied into the cluster power wire (yel) it’s a
good power pin.
C408:
Pin#6 - is open but has no pin and is not useable.
Pin#7 - power from cruise control fuse.
Pin#8 - is open but has no pin and is not useable.
Pin#11 - power from fuse 10. (Daylights) fuse or DRL
Pin#13 - is open but has no pin and is not useable.
Pin#14 - is open but has no pin and is not useable.
C502:
Pin#2 - power from fuse 1 (back up, meter, turn signals)
Pin#4 - is open but has no pin and is not useable.
Pin#7 - power from directional signals
Pin#8 - is open but has no pin and is not useable.
Pin#9 - is open but has no pin and is not useable.
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