Technical reverse beep and clunk

[YST]

reverse beep and gearbox clunk

Hey,

On my 1.2 2000 mk2 punto with auto gearbox I am having an issue. When I select a gear the whole car sort of jolts. I noticed a while ago that my reversing light did not work and when I looked at it the connector was dreadful and the earth was damaged. Today I have changed that and the light still does not work. However as a result the 'R' comes up on my dash which it did not previously and I get an alarm/beeping when I am in reverse. The jolt is still there though.

I read through this thread and was hoping that changing the connector would help. I guess it sort of has because I now see the R but I now have an alarm & blub warning light & the jolt.

https://www.fiatforum.com/punto-ii/266521-jolt-when-put-into-drive-reverse-help.html

Any other advice please? I feel like I have made a step forward but 2 steps back!

 

[homeward]

The jolt is probably due to the gearbox oil and filter never having been changed. No skimping on either; and if it's that bad, I'd change them again, after a thousand miles or so....

If you've got a bulb warning, either you've still got connection problems, a bulb has blown, or you've got the wrong wattage bulb in there.... :idea:

 

[YST]

Re: reverse beep and gearbox clunk

Thanks for replying!

I will get that changed next week then!

I have just got for a drive and here are my findings.

Put car in reverse and bulb warning comes on and beeping

In drive all okay.

Touch the brakes dash shows 'r' and beeping happens.

The bulb is brand new. The connection on the lights which I did today is solid. Could it be the light unit? I got the bulb out of a bulb kit should I buy a new bulb?

The beeping is worrying to be honest!

I think the connection must be okat because I never used to see the 'r' on the dash or the bulb warning

 

[homeward]

Re: reverse beep and gearbox clunk

Put car in reverse and bulb warning comes on and beeping.

Touch the brakes dash shows 'r' and beeping happens.

The beeping is worrying to be honest!

The car is supposed to beep, when it's in reverse. The fact that it's also beeping when you brake shows that there's still something wrong with the connection -- usually the earth: either on the light cluster, or in the boot. I'd be tempted to clean the terminals again -- especially the 'tongues' (until they are shiny, and free from any tarnish...) -- in the light cluster: as that is nearly always what causes this particular fault.

The bulb warning is indicative of something else wrong -- either, as I said, with the wattage of one of the bulbs (I think the tail-lights are supposed to be 10w, but often 5w ones are put in -- Ziggy122...?) -- but I've never seen this in connection with the reverse/earth/beep/brake problem (which is very common) -- or still with the connector. :idea:

When you have the gearbox oil done, order the gearbox filter beforehand -- or you could be waiting a while (try Eurocarcare.net or Shop4Parts -- both give discounts to members, after you've donated to the Forum) -- and make sure it's the recommended CVT oil they put in...!

 

[YST]

Re: reverse beep and gearbox clunk

The car is supposed to beep, when it's in reverse. The fact that it's also beeping when you brake shows that there's still something wrong with the connection -- usually the earth: either on the light cluster, or in the boot. I'd be tempted to clean the terminals again -- especially the 'tongues' (until they are shiny, and free from any tarnish...) -- in the light cluster: as that is nearly always what causes this particular fault.

The bulb warning is indicative of something else wrong -- either, as I said, with the wattage of one of the bulbs (I think the tail-lights are supposed to be 10w, but often 5w ones are put in -- Ziggy122...?) -- but I've never seen this in connection with the reverse/earth/beep/brake problem (which is very common) -- or still with the connector. :idea:

When you have the gearbox oil done, order the gearbox filter beforehand -- or you could be waiting a while (try Eurocarcare.net or Shop4Parts -- both give discounts to members, after you've donated to the Forum) -- and make sure it's the recommended CVT oil they put in...!

Okay cool. I feel a bit better knowing the beep is meant to be there for reverse and that it isn't a warning of something else! Do you know where all the earth points are on the car or have a diagram that does? I heard using baking soda is the best way to clean them up?

The light cluster it's self is very clean can you can see the connector is clean as a whistle. I will clean the pins on the light cluster though!

I will pop to the shops and buy a new reversing bulb and ensure it is 10w. I looked online and found it returned results for 21w on halfords?


Is it the gearbox oil something that I can easily do myself? Would like to try and save some cash if possible as just paid the insurance, new exhaust and Tyre!!

Will definitely be donating as the amount of help you and others have provided is second to none! Thank you homeward

 

[Ziggy122]

Re: reverse beep and gearbox clunk

Okay cool. I feel a bit better knowing the beep is meant to be there for reverse and that it isn't a warning of something else! Do you know where all the earth points are on the car or have a diagram that does? I heard using baking soda is the best way to clean them up?

The light cluster it's self is very clean can you can see the connector is clean as a whistle. I will clean the pins on the light cluster though!

I will pop to the shops and buy a new reversing bulb and ensure it is 10w. I looked online and found it returned results for 21w on halfords?


Is it the gearbox oil something that I can easily do myself? Would like to try and save some cash if possible as just paid the insurance, new exhaust and Tyre!!

Will definitely be donating as the amount of help you and others have provided is second to none! Thank you @homeward

*sigh*
Reverse - brake lights - indicators and fog light are p21w bulbs
If you have clear lens for a coloured bulb - ie clear indicators, you need an amber bulb version

the SIDE LIGHTS on the rear are 10w
see the punto's - Basic light malfunction guide

Ziggy

 

[oldhammer]

diagram here,

 

[YST]

Re: reverse beep and gearbox clunk

Sorry ziggy. Makes more sense now. Will take a look at the guide. Much appreciated and sorry for the stupidity

 

[homeward]

Re: reverse beep and gearbox clunk

I will pop to the shops and buy a new reversing bulb and ensure it is 10w. I looked online and found it returned results for 21w on halfords?

The reversing bulb is correct at 21W; it's the taillight bulbs that usually get replaced with the wrong ones: 5W, instead of the correct 10W -- which is what then throws the warning light on. I still think it's the connector, though: as you're getting the beep when you brake. So don't buy any bulbs until you've sorted that...! :idea:

Is it the gearbox oil something that I can easily do myself? Would like to try and save some cash if possible as just paid the insurance, new exhaust and Tyre!!

Gearbox oil is certainly DIY-able, just fiddly: as, if I remember correctly, you have to fill it up through the dipstick tube (my Haynes is in the car...). Filters are small (but expensive), and sometimes a pain to remove, as well; and it can take a while for everything to drain out -- leading to some of the old stuff being left behind: which is why I would do another change in a short while (so buy two filters, and twice the amount of CVT oil...)! :chin:

PS: There's a debate as to how much gearbox oil you need -- and I can't remember the correct amount... -- dave...? It says 1.98 litres Tutela CVT N.G. in the Owner Handbook, though....

PPS: Took too long to write my reply -- Ziggy122 and oldhammer have beaten me to most of it...! :worship:

 

[YST]

Re: reverse beep and gearbox clunk

so I have taken off the rear cluster again this morning. Cleaned up the connector on the cluster and checked the work I did yesterday. I got the cluster connector cleaned as much as possible and checked the bulbs. Bulbs are all correct and not burned. There is no visual damage on the inside of the cluster either.

I fitted it back and now the problem has changed!

The 'R' does not show on the dash and there is no beep when in reverse.
When putting car into drive the 'D' shows on dash and I get the warning beep
No beep when braking or indicating and no reverse light still...

Had a quote for £80 for a 'leccy to come and take a look but I don't have that much cash right now to spend on this. :/

 

[homeward]

Re: reverse beep and gearbox clunk

I hate to say this: but I think you've got a loose connection, somewhere; and that, each time you fit and re-fit the light cluster, you're disturbing it -- which is why the problem keeps fluctuating.

When you fitted the new light connector, how did you join its wires to the existing ones -- Scotchloks; solder; insulation tape...?

I'd be tempted to trace all the wiring as far as you can from the light cluster, and check its condition -- plus that of any joins. There's also an earth in the boot: which I would be tempted to clean up, as well, etc.. :idea:

I know this is frustrating: but I think you're nearly there... -- although the last of a line of problems is usually the most difficult to trace, as I think you're experiencing.... Good luck...!

 

[YST]

Re: reverse beep and gearbox clunk

I hate to say this: but I think you've got a loose connection, somewhere; and that, each time you fit and re-fit the light cluster, you're disturbing it -- which is why the problem keeps fluctuating.

When you fitted the new light connector, how did you join its wires to the existing ones -- Scotchloks; solder; insulation tape...?

I'd be tempted to trace all the wiring as far as you can from the light cluster, and check its condition -- plus that of any joins. There's also an earth in the boot: which I would be tempted to clean up, as well, etc.. :idea:

I know this is frustrating: but I think you're nearly there... -- although the last of a line of problems is usually the most difficult to trace, as I think you're experiencing.... Good luck...!

That's what I was thinking that it must be damaged else where. looks like the car is coming apart!

I used these to do the connection:

I double checked it today and the cables are matched correctly and they are in place firmly. I then covered the block with insulation tape.

Do you know where the earth is in the boot?


I hope I'm nearly there! Do you think I am going to do any harm by driving?

 

[YST]

Re: reverse beep and gearbox clunk

Traced the cables back to the rear seats and visually they all look good. the terminal which is bolted to the car is clean as a whistle and looks brand new.


Out of curiosity. I had a gps tracker fitted. It is fitted to a bunch of cables by the passenger fuse box. Looks really well done i must admit... that couldn't be a cause of it could it? I actually don't know when the issue of the reversing light first came about. was working fine when I bought the car a week previous to the tracker being fitted?

 

[oldhammer]

if you have alook in the boot, passenger side, pull the carpet back
not on the floor the side, you will see black block, this bolts to the car but
it unplugs its got terminal spades in it for earths,

look inside is any of them green,

there is another earth on same circuit, this is hidden behind bonnet catch inside
car,

other earth is just slightly back from airbag ecu,

other one is under bonnet, this one unplugs too,just like the one in boot,
same again look for green,

ive had mine in bits today so i now know where everything lives,
ifind wiring diagram confusing,

 

[YST]

if you have alook in the boot, passenger side, pull the carpet back
not on the floor the side, you will see black block, this bolts to the car but
it unplugs its got terminal spades in it for earths,

look inside is any of them green,

there is another earth on same circuit, this is hidden behind bonnet catch inside
car,

other earth is just slightly back from airbag ecu,

other one is under bonnet, this one unplugs too,just like the one in boot,
same again look for green,

ive had mine in bits today so i now know where everything lives,
ifind wiring diagram confusing,

This is absolutely perfect! I will try and take a look today at some point. Those wiring diagrams are a nightmare to get your head round. You should put that into the guides section. Thank you oldhammer