Defective vehicle relay replacement?
Hello everyone,
I want to replace the defective blower relay in my vehicle. The new relay I want to purchase has the same voltage and current rating (12 volts and 40 amps) as the old one.
Before I install it, I have the following questions:
Is it enough that the volt and ampere values are identical, or are there other important factors I need to consider?
Are there any typical errors that could occur during the replacement, or tips on how I can test the function of the new relay beforehand?
Thank you for your support!
Pictures 1 and 2 show the old relay, picture 3 shows the new relay.
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The size and design seem to fit so far, as does the switching logic.
The final question is whether the pin layout is correct. At first glance, I'd say yes.
On the bottom of the relay, where the pins are, it says which pin is which. If you look at it, you can see whether it's compatible.
Especially with simple load switching relays like this one, it's actually 99% likely to fit.
In addition to voltage and current, the design and contacts must also be suitable. This appears to be the case with the new relay.
There's no room for error when replacing the relay: the old one is pulled out and the new one is plugged in. I don't understand why you want to test a new relay. You'll notice if the fan starts running again after the replacement.
First of all, thank you very much for your support.
I'm a novice when it comes to automotive electronics, or electronics in general. So I was wondering if there are any other values besides voltage and amperage that are relevant, and if these should be checked before installation to avoid damaging the vehicle.
However, if this doesn't happen, I'll replace it as soon as I get the new relay.
You can use it without hesitation. However, make sure the fan is turned off first.