Toyota Yaris - Infuriating electrical fault on Toyota yaris

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Thu 21 Mar 2019 10:11
Toyota Yaris - Infuriating electrical fault on Toyota yaris - niggel
Hello all.
I have had an infuriating electrical problem with my Toyota Yaris since November 2018.
Whilst driving the engine management light together with airbag light,water in fuel and charging light illuminated. The heater motor ceased to work together with the direction indicators. The heated rear window light illuminated whichever position the switch was in.
I took it into Toyota dealership who had the car for three days and told me it was fixed.
I picked the car up and it lasted two weeks and about a 1000 miles when the same problem appeared.
Back to Toyota who had the car for a week and could not find the problem.
Except for wanting £600 for a new alternator.
Now I refused this.
And decided to trace wiring myself as it was now blowing the gauge fuse
Replace the fuse and sometimes it would be ok for a couple of weeks or immediately blow.
I know this is long winded but.
I found out that the reversing light wire which goes from the gearbox switch to a junction behind the engine and gearbox was shorting out this wire joins another wire in the depths of the wiring loom which is the alternator indication light.
Now I have since replaced the wire to the back of the gearbox revrouted the reversing light wire and put that on a separate fuse to an ignition live.
Problem sorted!!!!
So anyone with a Toyota which is blowing the gauge fuse should look at the reversing light circuit
I think had I returned it to Toyota they would have wanted to fix a new wiring loom.
I hope this helps someone as I was going to scrap the car and now have it back to total reliability.
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Thu 21 Mar 2019 11:02
Toyota Yaris - Infuriating electrical fault on Toyota yaris - SLO76
Rare to have problems with a Toyota electrics but this story is an example of why it pays to seek out a good auto electrician when you have an electrical fault. Most mechanics, main dealer or backstreet Joe know next to nowt about the electrical system and will tend towards expensive guesswork.
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Sat 23 Mar 2019 21:12
Toyota Yaris - Infuriating electrical fault on Toyota yaris - niggel
Hi there the Toyota Yaris is 2006 d4d 90bhp with 187,000 miles
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Sat 23 Mar 2019 00:06
Toyota Yaris - Infuriating electrical fault on Toyota yaris - Heidfirst

How old is the car?

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Sat 23 Mar 2019 07:42
Toyota Yaris - Infuriating electrical fault on Toyota yaris - nellyjak

Gotta agree with SLO...in such cases I would advocate the use of an auto- electrician.!!!

Many garages, including main dealers, are what you might call "General Practitioners"..sometimes you need a specialist.

An old phrase I always use....Guessing can be expensive,!

Edited by nellyjak on 23/03/2019 at 07:43

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