Speedometer / Cluster no light no activity.

[DeadEye]

Sunday morning, I went for a short ride on the V7 - everything seemed fine !

Last night after dinner decide to go for a ride and when I turn the Key - you hear the fuel pump trigger - But Nothing showed on the Speedo / Instrument cluster, No needle sweep, no neutral light. no ABS lights - No Millage - Nothing...
I drove it around the crescent like that , It seemed to run Ok , back to the house - off / on / off / on - Nothing on the display.

Check the ECU connector - melted my glove a bit
Took the Instrument cluster apart remove / reseat the connector, On / off / on /off - no change ?

DUh !
Is there a fuse for the Instrument cluster - I'll go hunt later.

 

[Mayakovski]

According to the wiring diagram:
Fuses

C-15 A
MIU G3 CONTROL UNIT
"ENGINE STOP"
INSTRUMENT PANEL
IGNITION
INJECTION LOAD RELAY

D-5 A (+battery)
INSTRUMENT PANEL
TURN INDICATORS
PRE-INSTALLATION BLUEDASH

 

[DeadEye]

Thank you Sir,
indeed no turn signals - but looked like Headlight was on and is started and ran so D-5 A look likely - But Why ???

Late when I got back from last nights ride...
Was threatened with that ll' be the LAST Ride your going on...

 

[curry sauce]

Have you disconnected the battery for a while.
Also done a fault code check?

 

[Vagrant]

FWIW, V7's are known for breaking off wires from the ignition switch. No slack. Worth a look.

 

[DeadEye]

D-5 A (+battery)
INSTRUMENT PANEL
TURN INDICATORS
PRE-INSTALLATION BLUEDASH

So it was that Fuse, and I have an idea of where there was friction.
While I was taking things apart - I decided to do the fuel filter ( 3 years after i bought it ?

)


It was a bit tricky to get out - my Big black finger had to Gently press that hose in to allow me to get that end of the assembly out of the tank.



There was still some gentle finageling after that, But what Goes in MUST Come out !
Now on to Short Hunting !

 

[john zibell]

Loctite 518 on the gasket will prevent it from leaking.

 

[DeadEye]

Going out to get a fuse or two and the Locktite 518,
( I guess Ottawa is a tiny burg,, no locktite other than thread licker local, 518 + Tesa harness tape coming from Bozo.)
Poping Over to Ask a Wrench with a Question

 

[DeadEye]

Ok, this doesn't look Factory to me...



But it was not hiding anything suspicious.

Power off ( Key off ) - plug in the fuse Poof !
So there is a Dead short between Rosso /bianca et arancione /nera
I'll be tracing those wires ...

 

[DeadEye]

I got the wiring diagram , Thank you Todd!
I was going to make a joke about the wire colors being in Italian , Then realized they were !

 

[DeadEye]

So, for my first trick, I’ll be looking for wear through spots in the harness in place.
( talking to my self )
Ok - maybe NOT First - with the battery disconnected - I can used a meter t o check for shorts between the signal light wiring, to try and isolate which *run* has the issue.
I guess I'll be focusing on the signal lights, but for the wires leading up to the Instrument cluster the issue could be anywhere along the harness between the fuse and the display unit.
The last option will be to remove the wiring harness completely for inspection…

 

[Raven]

A good job for a rainy day such as today. Well, not really good but...

 

[DeadEye]

I knew there had been some shenanigans with the tail light when I lost the running light one evening…


But it looks like they had “Bigger plans” for the rear end…but who knows what ?
Why grind those bits off ?



I picked up a rear assembly from a take-off bin from someone cheap, I’ll finally be making use of that purchase



The reason I’m back there is that I was getting continuity between ALL the pins from the connector when I unplugged it and tested !
I’m tempted to re-connect the battery and test fit a fuse to “see if she blows” with the back harness disconnected !

 

[V700Steve]

I would, saves time in the end.
The 1st Italian I learned was colors from diagrams in the T manual.

 

[DeadEye]

Ok, that’s back together “the way it came from the factory “ con cromo


I think they tried to relocate the light/license frame and failed !

Connected battery - rear harness not connected = No Poof
Connected harness = No Poof
Can I turn it on, with no instrument cluster attached ?

 

[V700Steve]

Yes, I think so, it may not start though, might need the neutral lite and other info.
Make sure dash connector is clean.

 

[DeadEye]

When I was looking at the wiring diagram, some circuits seemed to go “through the Instrument cluster” on their way to their destination Like the directional indicators.
So maybe no blinkers without the dash ?

 

[DeadEye]

@#&*$%$&¥£€§ !
Power Off , turn Power on with NO Instrument cluster, Power Off - no problem.
With the Power Off - plugging in Instrument cluster - Pfffsssst - fuse #3 poof
So either it’s in the wires powering the Instrument cluster
OR
The problem is in the Instrument cluster $$$$$

 

[DeadEye]

Someone had to be First - it was Not I -

V7iii Instrument Panel dead and fuse constantly blowing out

The 5amp fuse, D in the fuse box, shorts and blows. Continuity to turn signals, and through orange and black into the instrument panel! Unplug the Instrumpet panel and the fuse doe not blow. This is saying, a short is in the panel and as these seem to not open its all out of luck? The turn...

www.guzzitech.com

 

[V700Steve]

Imagine that a typical issue. If it happened to 2 then there's more out there.