Learner Driver
Posted 28 April 2025 - 11:21 AM
My 1995 SPI seems to have an extra fuse box hanging behind the throttle body. I wonder if it is something to do with the aftermarket immobiliser which was fitted many years ago? Any thoughts?
fuses 2 (1).jpg 110.86K
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How bad can it Be?
Posted 28 April 2025 - 12:21 PM
Someone that knows their stuff better than me will be along shortly I'm sure, but as far as I'm aware the early spi cars had a 4 fuse box as seen in your picture, this meant a lot of in line fuses in the loom itself. To resolve this they later, as per my car, went to a 24 fuse fox mounted in the same place. I'm wondering whether a previous owner has done away with the in line fuses and replaced them with the blade fuse box you mention. Thing to do would be to compare the wire colours into the blade fuses with the wiring diagrams for spi models found in the link below, this will give you your answer as to what's going through it.
https://www.theminif...agrams-redrawn/
Speeding Along Now
Posted 28 April 2025 - 02:18 PM
I ended up doing this to my spi too - what they've done is replaced the various in-line fuses (complete with fiddly and often unreliable holders) with a separate fusebox. Not a terrible idea, if its done properly. You can still check what fuse is what from the colours of the wires (the handbook had a section about this if I remember correctly). Its a shame you now have a mix of glass original fuses and modern blade fuses - make sure you've got spares of both!
..is NOT a girl!
Posted 28 April 2025 - 02:53 PM
Line fuse replacement would be my guess too.
Looking at the wiring diagram & comparing wire colours should confirm. The other question is are all the fuses of the correct rating. Glass fuses show the blow current - blades show how much current they are designed to carry continuously.
One Carb Or Two?
Posted 28 April 2025 - 05:06 PM
Yes, 99% (can't make out the colors of the wires) that the above is true. Replaced all in-line fuses that are behind the intake/airbox with that blade-type holder. If done right, this is a wonderful thing. The in-line fuses back there are prone to fail. How do I know? I have had more than a few. I have carefully replaced the ones that failed but it's a pain. I will likely do this update at some point. WiredByWilson sells a nice kit actually.
..is NOT a girl!
Posted 28 April 2025 - 08:30 PM
If you can't see the colours, it could be worthwhile lifting each fuse to see what stops working. Easier than waiting until something stops working then trying to guess the fuse.
Learner Driver
Posted 29 April 2025 - 07:38 AM
Thanks for all the information. I'll check the wiring colours and see if I can figure it all out. Great input from the forum!
One Carb Or Two?
Posted 29 April 2025 - 02:17 PM
Actually, I just re-read this and now have a question. My brother has a 95 SPi (UK built) and one thing I love about it is that, on his at least, Rover did away with the glass fuse box and inline fuses, and mounted a blade style box of fuses on the bulkhead. I'm not 100% if everything runs through there but most do. I wonder when Rover started doing this officially being that your car has the same setup as my 94 does?
Speeding Along Now
Posted 29 April 2025 - 06:25 PM
Actually, I just re-read this and now have a question. My brother has a 95 SPi (UK built) and one thing I love about it is that, on his at least, Rover did away with the glass fuse box and inline fuses, and mounted a blade style box of fuses on the bulkhead. I'm not 100% if everything runs through there but most do. I wonder when Rover started doing this officially being that your car has the same setup as my 94 does?
There was quite a few years of the SPis with just the original glass fuse box plus the inline fuses before they switched to the bigger blade-only one you're thinking of. My 94 and 95 SPis had the 4xglass, but my pals Equinox (P plate) had the all blade one.
Edited by roblightbody, 29 April 2025 - 06:26 PM.
One Carb Or Two?
Posted 29 April 2025 - 08:25 PM
This has REALLY got me thinking about updating my inline fuses behind the intake...guess I would have to do the glass ones as well. There I go down another rabbit hole! ha
How bad can it Be?
Posted Yesterday, 12:43 PM
My November 1995 Sidewalk has the 24 blade fuse box, so based on roblightbody's post the change looks like it came sometime in between January & November 1995. Sidewalks were released June 1995 I believe, so could it be narrowed down a bit further?
Edited by humph, Yesterday, 12:46 PM.
..is NOT a girl!
Posted Yesterday, 01:52 PM
There could be some overlap for different markets. Wouldn't be surprised if it's linked to the end of the line for the SU carb.
Blades should be marked with about half the amps of an equivalent glass fuse. There aren't equivalents for all, but I think you're ok if it's just the line fuses.
One Carb Or Two?
Posted Yesterday, 02:15 PM
Why are they half the amps?
Speeding Along Now
Posted Yesterday, 06:18 PM
My November 1995 Sidewalk has the 24 blade fuse box, so based on roblightbody's post the change looks like it came sometime in between January & November 1995. Sidewalks were released June 1995 I believe, so could it be narrowed down a bit further?
There was a few changes introduced with the sidewalk as I recall, it was also the first to have the inertia reel rear seat belts. My March 95 Sprite just had the static ones.
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