Oh yes, i completely forgot about the main earth crimps in the instrument loom during our conversation yesterday
That'll teach me to drive and talk at the same time
Electrical gremlins
- Thread starter Vern
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Ugly Cow
Registered user
so for 20 quid, a new second hand one is on the way.
Vern it may be prudent before you fit the s/hand loom to solder the joints before fitting. Just a thought.
Vern it may be prudent before you fit the s/hand loom to solder the joints before fitting. Just a thought.
The joints are usually one large lump of verdigris mess. And it'll take longer to solder up and make good than ( and cost more of your time) simply replacing and plugging in the short section of loom.
And Vern, i'm sure i don't have to tell you, but fill the loom with dielectric grease.
That's a new word on me, had to Google it. :cool
Just use silicone grease, its cheap at plumbers merchants, wipe round the soldered joint before shrinking the tube, or smear on connector pins. Dielectric grease has its place but not ideal for our applications. I have cut and pasted the reason below.
"It is important to note that dielectric grease will melt silicone rubber over time, and thus should not be used on connectors, such as o-rings, that are made of this rubber.
While the indicated use of dielectric grease calls for it to be used only on the non-metal parts of a connection, it has been shown to be effective at preventing corrosion when applied directly to the metal connectors as well. Care should be taken when using it in this way, because this application can, in some instances, cause the connection to stop working. A common reason for such a failure is that the grease has not been pushed entirely out of the way between the two points of contact."[/I]
"It is important to note that dielectric grease will melt silicone rubber over time, and thus should not be used on connectors, such as o-rings, that are made of this rubber.
While the indicated use of dielectric grease calls for it to be used only on the non-metal parts of a connection, it has been shown to be effective at preventing corrosion when applied directly to the metal connectors as well. Care should be taken when using it in this way, because this application can, in some instances, cause the connection to stop working. A common reason for such a failure is that the grease has not been pushed entirely out of the way between the two points of contact."[/I]
The part we're refering to isn't a connector.
But as you say silicon grease will work just as well. But it's a bit harder to warm up and get it to run down the sleeve
Ugly Cow
Registered user
Would have thought if the second hand loom earth joints are crimped, then to prevent further future problems then to solder the joints and heat shrink before fitting would be a good idea.
The loom didn't arrive today, and I couldn't be arsed anyway.
If the new one lasts as well as the old one, it's just going to get slapped on and forgotten about.It's not a tarts handbag you know
If the new one lasts as well as the old one, it's just going to get slapped on and forgotten about.It's not a tarts handbag you know
Ugly Cow
Registered user
.It's not a tarts handbag you know.
I am a tart and its my handbag, just an ugly cow
I am a tart and its my handbag, just an ugly cow
The part we're refering to isn't a connector.
But as you say silicon grease will work just as well. But it's a bit harder to warm up and get it to run down the sleeve
I appreciate that the earth connections are not connectors but the harness/loom he is getting does have connectors too I believe, so this was relevant.
I find that when you shrink the tube, if you start at the middle the grease is sufficiently viscous to get squeezed out the ends of the tube without needing to be thinned by heat. The reluctance to thin quickly in heat is an advantage in use as it does not leech out in hot conditions.
Silicone is widely used by British Telecom for crimp connections especially in damp conditions and has a good track record.
Ugly Cow
Registered user
So a few wires crimped together is not a connection, never knew that. What warmshed states is correct
FWIW I have been led to believe by auto electricians that soldered joints are not good on vehicles due to vibrations. Therefore as few joints as possible are the way forward and crimping on connectors.
Nothing wrong with some sort of grease on the joint and heat shrinking though.
Ugly Cow
Registered user
FWIW I have been led to believe by auto electricians that soldered joints are not good on vehicles due to vibrations. Therefore as few joints as possible are the way forward and crimping on connectors.
Soldered joints with heat shrink will not allow corossion to enter (unlike a crimmped connection). You are correct in that a soldered joint will not flex unlike a crimped connector. BUT if the joint is midway in the loom and tiewrapped / clipped up, this is the best joint, in this context.
Soldered joints with heat shrink will not allow corossion to enter (unlike a crimmped connection). You are correct in that a soldered joint will not flex unlike a crimped connector. BUT if the joint is midway in the loom and tiewrapped / clipped up, this is the best joint, in this context.
The weak point we're talking about is in the middle of the loom, which is approx 2 foot long.
time to scrap the old girl vern and get a 1200
You'll all be delighted to hear that the new old harness is modded and installed and I have a full set of idiot lights that glow brightly when they're meant to, and also go out when they should do as well
(except for the ABS warning lights that are now resident in the pond,so they won't be feckin annoying me any more)
I've also got all the lights in the speedo and rev counter as well, so it was quite strange riding home with them on.
Thanks for all your help and advice (except steptoe of course, who led me on a goose chase,and I hope his next shite is an angry hedgehog with herpes
)
I have now officially lost interest in this thread.
Thankyou and goodnight
(except for the ABS warning lights that are now resident in the pond,so they won't be feckin annoying me any more)I've also got all the lights in the speedo and rev counter as well, so it was quite strange riding home with them on.
Thanks for all your help and advice (except steptoe of course, who led me on a goose chase,and I hope his next shite is an angry hedgehog with herpes
)I have now officially lost interest in this thread.
Thankyou and goodnight
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