have been checking electric connections in my celica gt4 st185 in the fuse and relay box by the battery there is a relay which on the cover says head its not attached to anything is it surrposed to be and also found a loose wire which when connected to a earth sends my water temp guage all over the place and last but not least when looking at the water temp sensor on the other side by the dizzy cap is there surposed to be a sensor looks like it but just what i can only describe as a nipple any help much appreciated

_________________
sketch

got any picture for help fella?

_________________
1990 JDM ST185 Grey.
ST205 head gasket.
ARP head bolts.
ST205 Koyo Rad. (almost)
Front mount intercooler.
Colder plugs.
3" decat pipe.
4 Branch manifold.
Nitrous Oxide Steroids for Cars!

this is the wire which when connected to a earth sends my water temp guage all over the place


the fuse box and relay in question



the relay



underside of fuse box where the relay exits

_________________
sketch

sorry have to copy and paste pic links only photos i have

_________________
sketch

^^^ duder!, you must be able to see that those facebook links in the post above don't work

So please edit the links, and either remove the IMG tags, so we can at least click on the links...


or


make sure that you haven't ticked the box below the quick reply box where is says

x Disable BBCode in this post



From what i can remember about the ST185 fuse box:

# The 2 x fuses HEAD are for left and right headlight motors
# The RTR fuse stops the head lights from retracting
# If the fuse box cover shows the relay as HEAD then i would also assume that it operates the headlights aka Headlight relay.


do you have a sleepy lazy eye head light kit or similar ?

Have you a copy of the ST18x toyota repair manual in pdf?

_________________
ST165 turbo 4WD
ST185 GT-FOUR RC Carlos Sainz Limited Edition 825•5000
ST185 turbo 4WD Carlos Sainz Limited Edition 2541•5000

i used to but it was removed

_________________
sketch

as regards the manual i do have 1 but not the 1 ur mentioning

_________________
sketch

Relay should be for the headlights... so probably going to need that lol

and the grey plug looks like the water temp plug if you earth it the gauge will go off the scale..

temp switch is just a thermal earth, hotter it gets less resistance to earth an higher the gauge reads..

_________________
1990 JDM ST185 Grey.
ST205 head gasket.
ARP head bolts.
ST205 Koyo Rad. (almost)
Front mount intercooler.
Colder plugs.
3" decat pipe.
4 Branch manifold.
Nitrous Oxide Steroids for Cars!

do you know where the wire connects as i carnt find anywhere for it

_________________
sketch

i think it should be on the water elbow. on the back end of it.. facing dizzy.

Been thinking about this, my car isn't close by at the moment so cant look there.

Coolant temp is a 2wire switch im sure and is on the water outlet by the dizzy i think grey?

There is also a brown connector and poss a green one, i forget.

From the manual.....



The only other switch i can think of in that area that is single wire is the oil pressure on the end of the head just below the Interheater.



Spotted this in my sad day thread.

Does the car run or have any electrical faults to speak of?

_________________
1990 JDM ST185 Grey.
ST205 head gasket.
ARP head bolts.
ST205 Koyo Rad. (almost)
Front mount intercooler.
Colder plugs.
3" decat pipe.
4 Branch manifold.
Nitrous Oxide Steroids for Cars!

doesnt start cranks but wont fire all electrics seem to work plus no error readings on e.c.u

_________________
sketch

what were the circumstances behind this condition?

when it happened etc

_________________
1990 JDM ST185 Grey.
ST205 head gasket.
ARP head bolts.
ST205 Koyo Rad. (almost)
Front mount intercooler.
Colder plugs.
3" decat pipe.
4 Branch manifold.
Nitrous Oxide Steroids for Cars!

had the headgasket changed and car ran fine for about aweek then got a back fire and revs went high stopped the car and it wouldnt restart noticed a few little problems changed the broken water temp switch and e.c.u no problems showing tried starting the car started very lumpy then a lot of black smoke naighbour moaned switched it off now wont restart again was told it could be out of fuel or low put more in so i put approx 10 ltrs super unleaded but now it cranks but wont fire thats when i noticed the lose wire and nothing connected in the fuse box to the relay above

_________________
sketch

Ok Mate,

I've been reading a post called " Over Fueling" is that the same problem?

It kinda jumps from here to there in a very random and unhelpful way. lol

A wise man once told me several things that will always hold true when fixing anything.

"Knowlege is the Key to Power as Information is the key to success"
"To find the route too Evil, Retrace your Previous Steps"

These are not particularly difficult engines to work on in terms of complexity, they just arent that nice!
With that in mind some of the steps towards information will be missed as they are a pain in the *bleep*...

For the purpose of Knowlege, that information has to be attained to return the power.

SO INFORMATION..

1 before the head gasket was changed how did the car run and start.
in short, did it exibit any of the faults it has now?

2 When changing the head gasket, did you encounter any problems.
Plugs, wires, pipes etc you didn't see that had to be taken off mid head removal. Anything that may have gone back in the wrong place or gotten left off.

3 is there anything that you thought at the time of repair, you may have damaged or broken.

4 after the work was done did the temp gauge work, did the oil light go out, did you have boost, did it start clean, run well and did the cooling system bleed properly and the fans cut in.

I think once you have thought about the above and are happy with the above and have this INFORMATION, you need to clear your mind of what you think you already know and start again!

Maybe even make a list and stick to one path and dont skip steps.
Through this ive assumed you did the head gasket?
If you didnt you need to check everything, there are no loose connections, wires in the wrong places, pipes off, pipes or wires trapped that are causing issues you dont really have and masking ones you do.

I.e. the plug you have which doesn't look like the coolant temp but you said it affects the gauge?

Find the source of code 22. briefly Bridging the connector pins of the coolant temp connector with a paper clip should sweep the temp gauge from cold to hot.

Was it at idle when it backfired and rev'ed or did it backfire at speed the rev at idle etc

information my friend information.

_________________
1990 JDM ST185 Grey.
ST205 head gasket.
ARP head bolts.
ST205 Koyo Rad. (almost)
Front mount intercooler.
Colder plugs.
3" decat pipe.
4 Branch manifold.
Nitrous Oxide Steroids for Cars!