Morning all. My workhorse has recently started to suffer with a lazy starter. Have checked the voltage of the battery when cold and resting which is 12.2, dropping to below 10 when cranking. Have been told by someone far better with these things than me that although it's a bit low, I should start by checking / changing the main earth strap as that can also cause the symptoms. Plus it's a cheaper option to start with than a new battery.

Can anybody please advise the part number for this and/or length of the main earth strap in case I want to use a non-standard one - even better if you have a link to something suitable!

Equally if anyone else has any ideas as to cause / things to check, I'd be very grateful.

Thanks,

Sam.

Hi Sam

Welcome to the Forum

A healthy battery should show 12.5v+, 12.2 v shows its down a bit 70/80% 10 v shows depleted which indicates very high amps being drawn at start

You can check the starter with a clamp ammeter on the starter cable I have seen failing starters draw 700+Amps

It's good advice to check the earth straps as they can fail even if it looks OK if its hot/warm after and attempted start it's worth at least removing cleaning and reseating it obviously any sign of damage change it

Check www.realoem.com if you aren't aware put the last 7 digits of your vin into the search engine it will call up your model then check the sections for what you need (I would guess engine electrical section)

Good Hunting

Dave