Tap into heavy gauge wires?

I need to tap into the ignition wires and need to know the best way to do this. The wires are rather big and the regular wire taps seem like they will be too small or cut the wire in half if I try using them.

I also noticed that the alarm says to use a relay if the car uses a high current ignition or over 30 amp ignition systems. How do I know if I need to use a relay or if I can just wire it right up. I have a 1984 Toyota Celica GT Hatchback.

Thank you,

Jeff

Really I would like to do something a little cleaner and les likely to cause a problem in the long run. If I were going to solder the wires and wrap with heatshrink, this might be the way to go but because I can't get heatshring over the joint, I don't want to solder them.

Has anyone used the T-Tap wire Taps to do this???

3M SUPER33 TAPE?

Where can I get some of this stuff?

Jeff

get it at a home depot if you have one around you. at least at home depot they give you a bigger roll than auto parts stores. you will pay about 3.50 for the roll,and while your at the depot get some tartan tape as well this is cheap and great for wrapping wires to clean up the install job. tartan is also made by 3m. you will want to have both these tapes in your tool box at all times, super33 for the conections and tartan to clean up the job. stay away from frost king tape as it unravels in no time at all especially in a high heat environment. if you do all this you will be staright and have a great job in the end

Hey 84celica,

Like mobiletoys2002 said earlier : STAY AWAY FROM T-TAPS !   Always solder and tape your connections.   Also you said   I also noticed that the alarm says to use a relay if the car uses a high current ignition or over 30 amp ignition systems.  Are they talking about an ignition kill?  In that case a relay is usually supplied with the alarm.  Is it a remote starter?  Then again most on the market can handle 30 AMPS.  Besides I have yet to see a car that draws 30 AMPS on the ignition circuit. 

I guess I'll hold off on installing the remote start function until I can get some tape and more time to figure out where to tap in for the tach wire. I found the ignition module but do not know what wire to tap off of. My alarm comes with Tach Finder Technology but I don't want to randomly tap into wires to find a valid tach soarce.