should i change all the old fuses...

[rustneversleeps]

i have a 1988 325iC with mostly old fuses in the fuse box.Should i leave them alone or replace them all with new ones everything seems to work fine ....what do use guys do...

[AndrewBird]

A fuse doesn't wear out really. It might corrode and cause a problem, but if it is working, no needed to change anything. I would double check you have the correct amperage fuses installed though. Who knows what the previous owner put in.

[rustneversleeps]

ok Sounds good ...Every thing seem to be working,just thought since most of the fuses look like there originals.

[jeffnhiscars]

Greg at BavRestoration has said fuses do fatigue. For what they cost shouldn't be a complicated decision.

[M_3_X]

should i change all the old fuses...

My horn wasn't working when I got my 325i vert last summer, never didn't really worry about start diagnosing it until recently since I had other stuff first on my punch list.
First thing I did was check the fuse and it looked good. So I moved on to the relay, and that was it, but as soon as I try to activate it, the old fuse blew. It didn't look like it was blown but it was, i put a new fuse and its bee working no problems.
So I'm renewing all fuses and relays just as a preventative measure.

[estoguy]

As long as you carry spares, it's not a big deal. I've had my E30 for 4.5 years, and I've only changed 2 fuses, and that was due to my error causing them to blow. I think most of the fuses are still original.

[rustneversleeps]

I have tons from a previous buy,but this is what i have to deal with...
So i'll just leave it seeing that every thing is working..

[Das Delfin]

I mean if everything works, why change it?

if something doesn't work, test the fuse with a meter. it's as easy as that.

[rustneversleeps]

I suppose your right.I'll just leave it alone and carry spares...

[Dagamus(NM)]

I suppose your right.I'll just leave it alone and carry spares...

The cover has slots for spares. You can also stick some spares in empty slots and mark them with a sharpie so you know which you can use.

If you peruse the local junk yards you might grab a few extra relays and keep those in the glovebox.

[rustneversleeps]

ok i think i have room looking at the pics.As for the relays i have a few of those also.I think one of each for spares..
Off topic time to test the temp sending unit and the temp senors,blue and brown plug...

[Gregs///M]

The problem is the fuse and contacts have 30+ years of copper oxidation on it. This causes an electrical resistance and thus a voltage drop. The cluster is particularly susceptible to visually presenting this voltage drop in the form of twitching and inaccurate gauges. SO i recommend to replace fuse 10, 12 and 21 with new 7.5A fuses as a minimum.

[rustneversleeps]

Hey Greg thanks for your input cause it did pin point some errors and not sure if you notice,Not sure if it make a difference but maybe you can tell me...

Fuse #5. If you look at the pic and fuses left side looking from bottom to top fuse # 5 shows 7.5 Amp (Brown) "new from PO "and in the Bentley manual says 15 Amps (Lt Green) "weird"

Fuse # 9 Shows 15 Amps is correct but manual says 15 Amp (Brown) which looks like all 15 amps are (Lt Blue) maybe a miss print in the maual.

Fuse # 10 The one you recommended me to change again Bentley manual says 7.5 Amp (brown) but there a 15 Amp (Lt Blue) ....
So i guess or wonder why that the PO put a 15 Amp instead of a 7.5 Amp.

Fuse # 11 for Fuel delivery (fuel pump) Manual says 15 amps 1984-87
Or 7.5 Amp (brown) 1988-90 pic shows 15 Amp I'm assuming it's correct cause my 325iC is a 1988 Production date is 10/87 or could it be a wrong fuse again..

Fuse # 21 Again the one that you recommend to change and manual says 7.5 amp (brown) but there a 30 amp (Lt green)....Wowsie wow that don't seem right...

Fuses # 25 and #26 says Not Used and in the Bentley Manual shows blank empty sockets but there are 2 15 amps (Lt Blue) ..Would these be spares or are these use for something....I suppose it like fuse 15 is not used either and in the pic it;s empty and so is mine......

That's about it i guess.So I guess i have to make some changes right what do you think Greg...

[TobyB]

Greg at BavRestoration has said fuses do fatigue.

I fatigue, too.

I guess I should be replaced...

t

[Kershaw]

Eventually you will be.