How To Change An Alternator
How To Change An Alternator
To fully replace your vehicle's alternator, you have to start with the battery. It must be disconnected first for the purpose of safety and then you can move on to the alternator belt, cables and the alternator itself. For a thorough demonstration, this video on how to change an alternator is the one to watch.
Hello there. Now, we're showing you how to replace a full alternator in a vehicle. Starting with replacing the battery, first things you need to bear in mind with disconnecting a battery is safety.
You should always wear safety goggles like so and protective rubber gloves because obviously, batteries contain acid, and then we'll disconnect the batteries in just one second. And when disconnecting the battery, you have to positively choose the plus lead which is always red and the negative which is always black. Always start by removing the negative lead from that because that's grounded from the vehicle actually and by removing that, you are reducing the risk of short circuit.
So we remove like so. You always try and, if you can, remember to get your radio coats and other coats to do with the vehicle because disconnecting the battery can cause some free lost so they need to be reprogrammed afterwards. Now, you got one battery disconnected.
We're removing the alternator belt or sometimes called the auxiliary belt. We just do it like so, by releasing the tension there, the automatic tension on this side, and releasing the belt. The belt's released, no need to remove the belt completely in this instance and now, we're set about replacing the alternator.
To do that, we're releasing the bolt at the top and then the final bolt to secure the unit. Obviously, you put the bolt in a safe place so you could find it again afterwards when you reinstall. You may need to give the unit a bit of a leave or wide on the bracket so the connection could get to the final bolt and quite tucked away.
Now, to remove the old unit, you have the tunnel connections on the rear of the unit, you need to unwind. Obviously, if unsure, make a note of where the cables go before you remove them. But you should find, looking at the rear, you have two different sized fittings so they will only actually fit one way and you can't make a mistake there as you notice.
Now, we're going to reinstall the unit. That's basically in reverse of what we've just done to remove it, by replacing the wiring first, making sure that the internal just clings properly, okay. Again, there are different sides here so it's not something you can actually get wrong on this unit.
Then, we reposition the unit and start the bolt back in. Right, now the alternator's refitted, now becomes the time to refit the auxiliary belt. Again, begin by releasing the tensioner like so, refitting the auxiliary belt as you can see.
Now comes the time there to reconnect to the battery. Right, now we've put the alternator successfully, refitted the belt, it's now time to reconnect the battery. So once again, safety goggles on and protective gloves.
Firstly, to be reconnected, work with the live lead, the positive lead, and tighten like so. Then the last lead, be careful not to make any contact with the positive lead with a span or any other tool that you're using. Right, that's the battery reconnected.
Right, now the battery's been reconnected, we need to put some spray grease or lithium grease to the top of the battery, so to stop, basically, corrosions from occurring. Right, now that's done and now, we need to start the vehicle and ensure everything's working correctly. Right, now we're going test the alternator to make sure that it's actually putting a charge out.
So we buckle it with this device to the battery. As you can see, it's producing 14.2 volts which is more than enough to maintain this battery.
You need to get this performed by garage, your local garage basically. And that's the installation of the alternator. .