Testing Nissan Primera '94 Rear Window Heating Relay: Step-by-Step Guide with Multimeter Usage

Question

Hello colleagues. Question as in the subject. Well, the rear window heating in the Nissan Primera (94 ') does not work for me. I checked all transitions, fuses and the switch and read that the relay may be the reason. The only problem is that I have a meter but I have no idea how to check such a relay. In the found topics I did not find similar to mine, so please answer me.
Here is a photo of the relay.

Marzab10 · Answer

Connect the meter set for resistance to pins 3 and 5, connect the power supply to pins 1 and 2. And see if the resistance changes, if so, the relay is OK.

rafixs · Answer

Connect the power to 1 and 2, and connect the light bulb and power to 3 and 5

5bkera · Answer

Supply 12 V DC (and even from a 9V battery) pin coil 1,2 and check with an ohmmeter whether contacts 3 and 5 are closed.

Anonymous · Answer

On contact 1.2, after turning on the heating switch, a constant voltage of 12.6V should appear and connect the device there and check it. If it appears, you should hear the relay trip. Then connect the meter with one end of the meter to ground or minus of the battery, and + of the meter first to pin 3 and then to pin 5. If it shows 12.6 at 3, it means that the power supply from the battery through the switch comes to the relay. A functional relay will give this voltage to 5, if the contacts are burnt or do not meet, then there will be no voltage at 5. If it is, check the glass if it is on the glass, it means that the heater is out of order.

galwanizer · Answer

Thanks for the answers. The case looks like this, I don't know exactly which relay it is, but there are 4 of them and they all look the same. I am surprised only by the fact that after checking with the method that my colleagues Marzab10 and 5bker gave me on the relays, the meter does not show any resistance on pins 3 and 5 before and after applying voltage. After all, it is probably not possible that all of them are out of order. The fact that not long ago a tinsmith was welding something next to the car and the bulbs burned (he didn't want to unplug the battery) and maybe it really is ... I don't know. I will try the method given by the other two colleagues.

sebek3 · Answer

What is the power supply for these relays to check?

galwanizer · Answer

directly from the car battery

sebek3 · Answer

Check with an ohmmeter that the coil is not blown.

galwanizer · Answer

After applying the meter leads to pins 1 and 2, it shows no resistance in any range, including the option of checking the continuity of the circuit.

sebek3 · Answer

Blown coils - relays to be replaced.

Pokey · Answer

Check if you have a good meter (or wires to it) - shorten the ends if it shows 0.

galwanizer · Answer

Thanks colleagues (good meter - I checked). In that case, there is nothing else for me to do but buy relays. I greet and wish you a Merry Christmas

dziucel · Answer

Good morning,

I would like to check my relay, however it differs a bit from that in this topic.
Namely, it is about such a miracle:

Its scheme looks like this:

A full description of the relay can be found at the link
https://cdn.sos.sk/productdata/14/f1/68b31205/fbr-56nd12-w1.pdf

Can I check the relay without desoldering it from the board in which it is mounted?

Ronin64 · Answer

What is this PCB in which this relay works?

dziucel · Answer

Central Electronic Module (CEM) in Volvo V40 '01.

dzimi · Answer

Power supply of the relay coil to pins 4 and 3. Pin 1 and 2 as contacts.

dziucel wrote:
Can I check the relay without desoldering it from the board in which it is mounted?

- you can, just isolate the pin from the board. 4 and 3 as a power coil. Without power connection, contacts 6 and 5 should be closed with pin 2. However, after applying power to the coil, the 5 and 6 should be shorted with pin 1, while pin 2 should be open.

dziucel · Answer

what do you mean by isolate ??

dzimi · Answer

- suck off the tin to isolate the pin from the PCB.

[Solved] Testing Nissan Primera '94 Rear Window Heating Relay: Step-by-Step Guide with Multimeter Usage

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