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Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go hereXJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.
Like belly buttons, they mostly interchangeable but there are a few variations to watch out for. Bosch makes the larger square ones with either a type A or type B pinout, and it's annoying that they didn't changes the pins so you can't accidentally swap them. Most automotive uses pinout B, I think. Some have a diode to suppress kickback if switching inductive loads like motors to help protect the electronics, and some are two poles/contacts. Some, like the one on my tractor have a time delay to hold the fuel cutoff solenoid closed for a bit after you turn the switch off. Most have a diagram or pin numbers printed on them to help figure it out. Best bet is to match up the part number if you can. The short 5-digit number is usually a DIN number. https://www.12voltplanet.co.uk/relay-guide.html
Thank you! This is exactly the type of understanding I was looking for. I appreciate it.
Right, but I was not sure if those would work as they do not have the same part #s on them, which is why this thread exists. Of course I searched "relay" and *every variation* of the numbers printed on the relays themselves before posting here. The results did not clarify anything for me.
Engine: 4.3L with headers and full 3" exhaust system
Relays are grouped by rated amperage. Beyond that it is normally open or normally closed. Those are the things that count. Of course there is a size difference, waterproof or not and specialty relays. So all you have to know are rating and switch function. Pretty easy really
Engine: 4.3L with headers and full 3" exhaust system
Lots of people are mystified as to what these are.
When you get to know how they work, you can set up your own to do whatever you want
I set this mess up to run a two speed and single speed fan and oil cooler fans with a cut out for fording. It may look like a rats nest, but this is how a computer chip works only on a much larger scale.
This is what they look on the inside. The way our automotive relays are set up, terminal 30 is power in and connected full time to the spade in the middle. When those points on the top connect, it breaks contact with the middle terminal and powers the one on the opposite side. So let's say you wanted to wire up headlights. Power in from the light switch, the terminal in the middle would be the dim lights. Powering the coil would switch off the dim lights and turn on the brights.
That is the normally "open" and is the most common. There is also a normally closed type that works the opposite way.
