VSS Signal Splitter to Speedometer and ECM

what do you use to split the vss signal to the speedo gauge and ecm? currently, i'm getting CEL vss error code 17 on my 1994 honda prelude si i had to recently replaced the speedo and tacho, tapping the signal from the ecm to the gauges. i've put in voltage regulators and capacitors to clean up the signal to the electrical gauges. all works well but the voltage regulators and capacitors are 'stealing' the signal away from the ecm, tripping the error code. jaytan1976