If you are handy with electronics and a soldering iron, you can make your own for a buck or two.
Each is only a resistor and capacitor along with some wire.
Have the schematic around someplace, probably on my old hard drive...
Steve
98 Contour SE Sport 2.5 Duratec ATX The wifey's car
89 Taurus SHO - 246K miles
94 SHO ATX - 190K
1997 F-150 5.4L ATX - The Workhorse 150K.
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