Flex Relay Wiring

Hi Forum, I did some searching and didn't find much on flex Relays and Viper systems install. What I do now know it's pretty much either a 4 pin or 5 pin relay. I see the wiring instructions call for 87a etc pins on the relay- can anyone shed some light on the common configurations for Flex relays as I guess there are flex standards for the 4 pin and 5 pin relays?

Not sure I understand "flex" part of your question and if it directly relates to the Viper and its' Flex Relay. Anyway, this site has some good basic info on relays here : https://www.the12volt.com/relays/spdt-and-spst-automotive-relays.asp And useful list of relay application diagrams here : https://www.the12volt.com/relays/relaydiagrams.asp The Vipers Flex relay is an internal ignition output relay that can be programmed to either Ignition2 ( default ), Accessory2 or Starter2. Be aware that on some DEI R/S units ( i.e. 4105 ) Starter2 is not supported. The only other relay convention concerns coil polarity. As mentioned in the relay info, sometimes a relay will have a diode across its' coil. If it does, it is important that Pin 85 receive the (-) input and Pin 86 get the (+) input. Many installers will add this diode across pins 85 and 86 to protect the device that supplies the coil input. This is called "coil quenching" and prevents a high voltage spike that is generated when the coil field collapses from damaging connected devices. The quenching diode is typically a 1N4007 although a 1N4004 should be sufficient.Soldering is fun!