Check Engine Warning Light After Battery Change

[petemagsati]

I just changed my Battery in my E12 corolla 1.4, and the car was running fine for about 20 miles and then BOOM! engine warning light. I disconnected the Battery and hooked it up again and the light was gone. After driving the car for another few miles the f****** ***** ***** came on again at the exact same place it had before; after a long straight at 60mph in 5th. I've heard about the "paperclip check" where you get the error codes by connecting 2 particular terminals on a "DLC1" plug, but anything I can find specific to my corolla only mentions the DLC3 plug under the dash and all the equipment that has to go with it. Does anyone know if there is a DLC1 plug somewhere in the engine bay and if so where? And if not, is it possible to get the codes from the DLC3 without some specialised device, ie by just connecting two terminals with a length of wire?

I am flat broke, but I own a length of wire and am willing to get mildly electrocuted.