Electrical Brainteaser - Help Please

[vigman]

Well yes

You could put an inline circut breaker ( like in your fuse panel) that would reset in case of a short or a regular fuse... I would need to calculate the fusible link current.



Now according to the book

The fusible link is 4 wire gauges down from the wire is is protecting.

the main feed wire is a 2.0 metric
( =14 gauge american)
and the link is indicated as a .5 ( rust color )
(=20 gauge american)

( and this information is of little help to me)

However,
In the circut you have the following loads
ECM ( 3 amp)
Fuel pump ( biggest load ) 10 amp
Oil pressure switch
Mass burn off relay
Mass burn off control relay
( guessing around 7.5 for the last 3)

Im going to GUESS 20 amp..


Vig!

 

[toggyvet]

Fusible Link rating

You're probably spot on Vig - I've just realised that many of the fusible links, where they join the black plastic rubber thing, have a number on the rubber part - the values I've spotted are 12, 14, 16 and 20, so these must be ratings - link H does indeed have a 20 on it, so I'm going with that.

 

[vigman]

That MIGHT be correct

If the smaller number links have what FEELS
( not looks) like a smaller wire in the link area ( not the jacket.. but the actual conductor),
then we may be on to something.

Will you replace the link or go with an inline fuse... or circut breaker?

Circut breaker might be the way to go..in case it trips it will reset over time.

Stores that do car stereos & alarms have nice aftermarket fuse holders.. that could be silghtly modified to accept a breaker.. so you could go either way.

The bit that concerns me... is this all started when you "Bumped" the curb... have we found what actualy caused the link to go?

And did you get my PM about "Bubbles & Squeek"?

We know it's a british food.. but what the hell is it?

Vig!

 

[toggyvet]

Squeaky bubbles

Try this for size

http://www.greatbritishkitchen.co.uk/gbk/recipes/beef/bubbleandsqueak.htm

Bon Appetite!

 

[toggyvet]

Guess what I've just been driving ????

Hey - there is a god!!!!!!

It was just fusible link H - why didn't I guess that in the first place???

I thought - what better than to replace the old fusible link wire with the SAME link wire, just chop the end off where the corrosion had taken place.

So I connected the end of the old link, to the fuel pump circuitry with a temporary connector, charged the battery up fully, connected it all up and.........

Turned the ignition to 'ON'.........

Oooh, listen to that fuel pump howl............

Dare I turn the key one more turn..............

Should I, Could I ??????

Oh sweet, sweet, V8 rumble - how I missed you so...............

Took her out for a quick once round the block...............

Still got some tidying up to do (like make the connection permanent, screw all the relays back to their resting positions, put the side body piece back on, LABEL all the components I've identified for next time) and then I'm gonna give her a damn good clean and polish.

THANKS EVERYONE for your help - I'd have been lost without the advice and support (which I'm sure I'll need again)

As soon as I can work it out (can anyone tell me how, quickly), I'll put a picture of the car with my profile.

Cheers all

 

[toggyvet]

Found out about the photo now!

:bar

 

[Corvette-Pilot]

You might want to carry that extra link with you.
What ever caused this to happen in the first place may still be there !

 

[vigman]

Yahoo!

Great news!

What corrosion??????? on what link...

Score another one for the Vig!

 

[toggyvet]

What corrosion????

The corrosion was simply where the fusible link had burnt out, the strands of wire were all black and fused together.