hey how do i wire up my fc fuse to my fb
08-23-09, 02:46 PM
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Wiring the FC fuse block into your FB is a very easy job and only takes a basic understanding of how the fuse block works. Forgive me if this is too basic but it may help others with less understanding. Also, forgive me if something is inaccurate. I did this several months ago so a lot of it is off of memory.
Before you start with any of the wiring, you should find an appropriate place to mount the bigger fuse block. You should also disconnect the power from the battery to keep from shorting anything.
Basically, you have one wire that comes off of the battery and goes to the original FB fuse block. In my 85 GSL-SE this was a wire from the battery that attached to a couple metal brackets on the two small stock fuse blocks. This main wire powers all the other wires coming off of the fuse block. Power from this wire is split off through several fusible links. You can think of it as one big power input with several smaller power outputs, each one with their own fuse. By replacing this fuse block with an FC fuse block you have room for more fuses if you want to run aftermarket electronics like an electric fan, etc. You also get rid of the fusible links which can be hard to find replacements, and can be hard to diagnose if one of them is blown.
When I replaced my FB fuse block, I really beefed up my whole electric system to prepare it for a larger alternator and a big sound system. It may be a little overkill but I know it will handle anything now. I ran a new 4 guage wire from the battery to the main fuse on the FC fuse block. I don't know what year my fuse block is from but it was the thick black wire on the FC. From the other side of the main fuse I ran a 4 guage wire directly to the alternator. I used the FC 100 amp fuse for this. Also, a big 4 guage wire will be enough to handle all the original electronics, plus an electric fan, my msd ignition box, and the electric/heated rx-8 seats I installed. If you don't have this much stuff you can probably stick with the factory wires.
Now that the main fuse has power, it is time to wire up all the other wires that ran off the factory fuse blocks. Each is labeled but may vary with your FB. For me it was Head (small white wire with blue stripe), Main (thick white wire with red stripe), Retractor (thin white wire with red stripe), Inject (thick white wire), and Computer (thin white wire with blue strip). If you don't have the GSL-SE I don't know exactly what they say but that isn't the important part. You simply cut the wires below the FB fuse block and attach them to the FC fuse block. Remember, I used the main fuse on the FC for an additional thick alternator wire so you have to use a different fuse for the wire that came off of the FB main fuse block. This is not a problem though. My car is running just fine.
There are several different ways to do connect the wires. If the wires coming off of the FC fuse block are long enough you can just connect them with butt connectors. Mine was too short so I pulled the factory FC plugs out of the fuse block. Then I got some female spade terminals and widened them with some needle nose pliers and just pushed them onto the fuse blocks male spade terminals. These are a little wider than the standard electrical spade terminals. That is why they have to be slightly modified. The secret is to widen the female spades a little smaller than the male side so it will make a tight fit. Using the modified female spade terminals is probably the best bet even if the wires on the FC fuse block are cut long. This is because depending on what model FC you got your fuse block from, every fuse may not have been used. Using the factory FC plugs may not allow access to all the fuses.
I couldn't find any information on the amperage of the FB fusible links so I just kind of guessed on what fuses to use. This is the only part that could be incorrect on my install.
I basically used a 60 amp fuse for the main wire (thick white with red stripe) and 30 amp fuses on everything else. 30 amps should be enough for everything because the original FB alternator was only 55 amps.
If you have any questions just let me know. I can add pictures if you need. If you still have any questions then just PM me. I'll give you my phone number and we can talk through it. that way we are sure to get your FB running with a happier fuse block.
Before you start with any of the wiring, you should find an appropriate place to mount the bigger fuse block. You should also disconnect the power from the battery to keep from shorting anything.
Basically, you have one wire that comes off of the battery and goes to the original FB fuse block. In my 85 GSL-SE this was a wire from the battery that attached to a couple metal brackets on the two small stock fuse blocks. This main wire powers all the other wires coming off of the fuse block. Power from this wire is split off through several fusible links. You can think of it as one big power input with several smaller power outputs, each one with their own fuse. By replacing this fuse block with an FC fuse block you have room for more fuses if you want to run aftermarket electronics like an electric fan, etc. You also get rid of the fusible links which can be hard to find replacements, and can be hard to diagnose if one of them is blown.
When I replaced my FB fuse block, I really beefed up my whole electric system to prepare it for a larger alternator and a big sound system. It may be a little overkill but I know it will handle anything now. I ran a new 4 guage wire from the battery to the main fuse on the FC fuse block. I don't know what year my fuse block is from but it was the thick black wire on the FC. From the other side of the main fuse I ran a 4 guage wire directly to the alternator. I used the FC 100 amp fuse for this. Also, a big 4 guage wire will be enough to handle all the original electronics, plus an electric fan, my msd ignition box, and the electric/heated rx-8 seats I installed. If you don't have this much stuff you can probably stick with the factory wires.
Now that the main fuse has power, it is time to wire up all the other wires that ran off the factory fuse blocks. Each is labeled but may vary with your FB. For me it was Head (small white wire with blue stripe), Main (thick white wire with red stripe), Retractor (thin white wire with red stripe), Inject (thick white wire), and Computer (thin white wire with blue strip). If you don't have the GSL-SE I don't know exactly what they say but that isn't the important part. You simply cut the wires below the FB fuse block and attach them to the FC fuse block. Remember, I used the main fuse on the FC for an additional thick alternator wire so you have to use a different fuse for the wire that came off of the FB main fuse block. This is not a problem though. My car is running just fine.
There are several different ways to do connect the wires. If the wires coming off of the FC fuse block are long enough you can just connect them with butt connectors. Mine was too short so I pulled the factory FC plugs out of the fuse block. Then I got some female spade terminals and widened them with some needle nose pliers and just pushed them onto the fuse blocks male spade terminals. These are a little wider than the standard electrical spade terminals. That is why they have to be slightly modified. The secret is to widen the female spades a little smaller than the male side so it will make a tight fit. Using the modified female spade terminals is probably the best bet even if the wires on the FC fuse block are cut long. This is because depending on what model FC you got your fuse block from, every fuse may not have been used. Using the factory FC plugs may not allow access to all the fuses.
I couldn't find any information on the amperage of the FB fusible links so I just kind of guessed on what fuses to use. This is the only part that could be incorrect on my install.
I basically used a 60 amp fuse for the main wire (thick white with red stripe) and 30 amp fuses on everything else. 30 amps should be enough for everything because the original FB alternator was only 55 amps.
If you have any questions just let me know. I can add pictures if you need. If you still have any questions then just PM me. I'll give you my phone number and we can talk through it. that way we are sure to get your FB running with a happier fuse block.
08-23-09, 10:30 PM
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any pics cause my stock wires look different compaired to ther fc's...also the main fuse where the battery is connected to i noticed that theres 2 black wires(1for the battery) what is the other for
again pics would be nice
again pics would be nice
08-23-09, 10:42 PM
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On my FB there were two black wires on the fuse block. One went to the battery, the other went to another fuse block. My FB had two fuse blocks. I'll have to see about getting pics. Since my fuse block is already installed it will be hard to get any decent pics to explain things. I'll see what I can whip up though. I have an extra fuse block I might be able to use.
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08-24-09, 12:04 AM
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I used a new 4 gauge wire from the battery to the FC fuse box. I needed a bigger than factory wire to handle all the extra accessories I am adding on. Then I crimped female spade terminals onto the factory FB wires. I slid the spade terminals directly onto the FC fuse block. I didn't attach them to the FC wires. Not all the FC fuses had wires coming out. Not all the FC's were fully loaded, therefore some of the fuses were not used do to lack of factory accessories. If i used the factory FC wires coming out of the fuse block I wouldn't be able to us all the fuses and that would waste space. I am actually going to wire in my second fuse block once I finish the wiring for my rx8 seats.
11-15-11, 01:49 PM
#18
When I did mine, I went to NAPA and purchased the bigger (yellow) spade connectors. I then used a hammer and smashed the OLD material around the 1st Gen brown block. I then removed the connectors from the factory wires and put the new NAPA spade connectors one. I ran a 1 1/2 foot power wire from the battery + side to the main 80amp fuse 2nd gen block. Just open the little door and remove the bolt and connect it the line. No splicing of wires was needed.
I'll get some picutres tonight, but you can use the 2nd gen factory fuse block bracket but just cutting off part of one part and drilling one hole.
I'll get some picutres tonight, but you can use the 2nd gen factory fuse block bracket but just cutting off part of one part and drilling one hole.
11-15-11, 11:12 PM
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I ordered the bracket from respeed and yea the little door is awesome It was the first thing I noticed about the fuse block today haven't put the bracket in yet and I have e fan an fog light fires to trace down as well. And I don't know about the check relay thing right by the clutch resevouvir and brake cylinder?? I posted about it on a thread I started asking some questions. I'll figure it out
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