EF32RL & EF32RLNP

For this test, you need a volt-meter (or test-light), the flasher should be removed from the socket, and the ignition must be turned on.

If your socket is wired correctly, you should be  able to measure +12 Volts at the X-prong, and 0 Volts at the L-prong.  Using a voltmeter, insert the red probe into the socket's X-prong, and touch the black probe to ground (metal on vehicle).  Repeat these steps but this time with the red probe in the L-terminal of the socket.

If you measured +12V at X, and 0 Volts at L, then your socket is wired correctly, you do not need any additional parts and you can use the EF32RL or the EF32RLNP.

If, on the other hand, you measured +12V at L, then your socket polarity (wiring) is reversed, you must either use the EF32RLNP, or (if you already purchased the EF32RL) you must "fix" or "work-around" the incorrectly wired socket. Please see the Installation page for more info.

Socket Polarity Test (not necessary when using the EF32RLNP)

​Flasher Sockets are supposed to be wired in a particular way (see below).  If the socket is wired "backwards", electronic flashers (other than the EF32RLNP) will GENERALLY not work without rectifying this first.  See the Installation page for how to fix this if your test determined that the socket is wired incorrectly.

If you need a 2-prong flasher that will work regardless of the polarity at the socket, please use the EF32RLNP instead.

​The image below shows the socket terminals after removing the flasher: In most cases, the socket terminals are not marked, but you can use the relative position to determine which terminal in the socket should be X and which should be L.

X = Battery = Positive (+12 Volts)

L = Load = Lamps (0 Volts)