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Sold
by simon8201 - 09/09/26 01:46 PM
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Wales
by Joske Vermeule, September 1
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Forums39
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Jun 14th, 2026
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Joined: Dec 2021
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L - Learner Plates On
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L - Learner Plates On
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A loose connection can also be described as "resistive." The same applies to a corroded or dirty connection. At the connection point, the increased resistance causes the temperature at the connection to increase. The load of the circuit (in Watts), whether it is a headlight, horn, or fan, remains the same, as does the voltage (14.2). Therefore, if the total circuit resistance goes up, the total circuit amperage decreases proportionally, failing to trip a magnetic breaker. That's why electric motors often have a thermal protection breaker built in. In a locked rotor condition, resistance skyrockets and the current goes down...but the load remains, so the heat increases, sometimes to the point of combustion. Furthermore, as the conductor heat increases, its resistance drops, exacerbating the problem. I've attached a photo of a resistive connection nearing the end state: ![[Linked Image]](https://tm-img.com/images/2022/09/17/IMG_0022.jpg)
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Joined: Jul 2022
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Learner Plates Off!
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OP
Learner Plates Off!
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WOW! Thanks for the lesson in electricity. Do AC and DC behave the same?
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Joined: Jul 2019
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Charter Member
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Charter Member
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In terms of loose dirty or corroded connections... Yes. In the image GP posted above, the bad connection creates extra resistance in the circuit and can act like the element in an electric fire.
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Joined: Jul 2007
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Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,836 Likes: 761 |
A loose connection can also be described as "resistive." The same applies to a corroded or dirty connection. At the connection point, the increased resistance causes the temperature at the connection to increase. The load of the circuit (in Watts), whether it is a headlight, horn, or fan, remains the same, as does the voltage (14.2). Therefore, if the total circuit resistance goes up, the total circuit amperage decreases proportionally, failing to trip a magnetic breaker. That's why electric motors often have a thermal protection breaker built in. In a locked rotor condition, resistance skyrockets and the current goes down...but the load remains, so the heat increases, sometimes to the point of combustion. Furthermore, as the conductor heat increases, its resistance drops, exacerbating the problem. I've attached a photo of a resistive connection nearing the end state: Which is why you do thermal testing on control panels in factories. Very scary to see that nut red hot.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Feb 2021
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L - Learner Plates On
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L - Learner Plates On
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What did I do in my Morgan today? Nothing. Certainly not for the foreseeable future! ![[Linked Image]](https://www.tm-img.com/images/2022/09/17/BDA24634-2BD4-40B5-8F84-231CA37E7DC0.th.jpg)
2005 Plus 4
2020 Hyundai eKona
2020 Mitsubishi Outlander PHEV
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Joined: Jul 2019
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Charter Member
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Charter Member
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Sorry to see that... hope you recover soon and can get back to enjoying things, incuding your Morgan.
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Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
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Oh dear. I hope that doesn't take too long to recover!
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Jul 2007
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Member of the Inner Circle
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Member of the Inner Circle
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JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Charter Member
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That looks painful. Hope it heals quickly.
Paul
Costock, UK
Plus Four 75th - Furka Rouge - Pip
Disco 5
Teddy - 17h1 Irish Draught cross
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Learner Plates Off!
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OP
Learner Plates Off!
Joined: Jul 2022
Posts: 460 Likes: 80 |
Heal fast! People who think that laughter is the best medicine have never had morphine...
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