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Jaydug

First assumption isn't always correct.

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On my last towing session I suspected that my fridge wasn't cooling when on the move.   I did a quick check with the multimeter on pin No 6 (with the engine running) and it showed zero.   I assumed the Ryder sensing relay was faulty, so I ordered one so that it would be at home on my return.   This morning I fitted it........ I started the engine and checked terminal No 6 again.   Still no reading.   Also there was no reading on the relay either.   Surely I hadn't received another duff relay?   I checked the two positive terminals on the relay and they showed 12.6 so no problem there!!!!!!!!!!!!!!!! But hang on.............. With the engine running, shouldn't they be showing 13+ volts?   I went to check the fuses under the bonnet.   All Ok.   Then over to the battery.    There was the fault.   The terminal was loose.   Tight enough to pass 12.6 volts, but not 14volts when the engine was running.   The relay wasn't receiving sufficient power to trigger the fridge charge.   Big relief!

 

2038957534_Batteryterminal.jpg.7ef552676be1f2b6744ff62a721b07be.jpg

 

Red marks the loose terminal.   Yellow two 2.5mm cables.

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I learned very quickly at work that "assume" meant making an ass out of you and me.

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Those terminals look pretty manky to me. Its worth noting the inside of clamp terminals can harbour corrosion, especially on the negative post, so simply tightening them may afford a temporary solution  Time to clean the posts and terminals or a repeat of your issue may follow.

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And apply some battery grease!

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Well done for persevering & finding an answer to your problem . Most competent engineers do the same .🚔🛠🛠

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Good work and thanks for sharing

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1 hour ago, chrisn7 said:

Those terminals look pretty manky to me.

 

Were the terminals corroded, the first place it would occur is around the battery post, where there isn't any.   What you are looking at is eleven year old galvanize.   Here's some more - this time from the other side of the engine compartment.

 

 

IMG_20190710_145232.jpg.19aa727a2cb81eb4340dd5c5821b7f12.jpg

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Or to quote another

 

”If in doubt, check”  Remember the old Athena poster with the girl tennis player??

 

Andy

 

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4 hours ago, Mr Plodd said:

Or to quote another

 

”If in doubt, check”  Remember the old Athena poster with the girl tennis player??

 

Andy

 

image.thumb.png.d028739891aad70b5633391fdac2d9a0.png

image.thumb.png.41abc37cf1dcd45361e8b1f63c8bfb71.png

Edited by Sea&Sand
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8 hours ago, Sea&Sand said:

image.thumb.png.d028739891aad70b5633391fdac2d9a0.png

image.thumb.png.41abc37cf1dcd45361e8b1f63c8bfb71.png

Background voice: 'New balls, please' ... :P

Steve

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On ‎10‎/‎07‎/‎2019 at 13:50, kelper said:

And apply some battery grease!

 

Or silicon grease, I use contralube 770.

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