Amazon is suggesting that I purchase a relay and harness in addition to this unit. Do I need those extra parts? I hate to buy something I don't need
881722
well it depends, i dont think you need the relay, but you may need the harness if your car has never had an alarm before. just to note, this works more like a factory alarm, nothing fancy, its just to open/close doors etc. If the alarm is going off, you would get any indication on the remote
881723
I did not have to buy any additional part for my install in a 97 Ford E350.
678540
I'm sure some people do recommend using a relay,however I did not use one ,and it still works GREAT! Very Loud,would buy again.
32390
it comes the pair with kit of wires, relay and switch. just not the instructions.
661388
No wire is included. As I remember it did include a relay. Use size 16 or 18 wire to trigger the relay and #12 to carry the load to the horns. The horns will pull a lot of current (amps) when activated and using #12 wire should eliminate any significant voltage drop.
1195746
A relay is included but I didnt need it. Check your furnace set up...chances are you have a 24v HUM hookup on your furnace.
2196482
I bought one of these, but had a mechanic install it. He did not mention needing anything else.
2192933
I'm not sure how this is a yes or no question. If it was me I would just buy the motion detector alone. They are available and would be of better quality and higher amperage, to cover your relay.
614603
I agree with Kerry...mine came with the relay...loud and I feel safer now! Be sure and use the relay!!!
450894
Yes, It comes with everything except relays. I purchased two of them and they are nicely made. Great product.
2103332
It has everything needed. I used my own wire harness but it included one that would have worked.
2226712
No it doesn't. It has all the connectors etc to make it up but relays not includedGood quality though
1599524
I am fairly certain you need the whole system. We bought this as a replacement part that broke with our current system. You need the charging piece and the remote lifting piece to make it work.
2110583
No , if you used existing wire you should already have a relay in line. My horn is not much louter then factory. Not real impressed with this horn.
1819983
I would highly advise using the extra harness and relay. Otherwise your lights will flicker when the boat is off and without a relay there is a higher probability for something to go wrong, could result in a fire even. They will work without a relay, I just highly suggest you use a relay.
1328127
If I recall correctly, you shouldn't need anything else -- maybe some electrical tape to hook it up to the existing wires.
1001267
No. Relays are recommended when device draws considerable amount of amperage. The dome light draws very little amps therefore relay not needed. Installed mine in Polaris Ranger and works great.
1590785
Well one wire harness does 2 lights, and if your going to run 3 light I would recommend 2 harness. You don't want to overload the relay. Hope that helps