2003 caravan security light

I installed an autostart 2481 wired with relay for second starter - Now when the vehicle is remote started everything works fine but when you do a key take over the security light comes on and stays on. Anytime the vehicle is started with the key the light now comes on and stays on. This light didn't come on before. The van has a Grey key and no immobilizer. No oem security system. If anyone can help that would be great... Thanks

The security light implies security system and/or immobilizer but you state yours has neither so the light shouldn't light up because the systems don't exist. What country are you in? I can't really say how to fix it, caravans in these parts have immobilizers and get bypasses installed to deal with them.