1998 Altima remote start add-on
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=41763
Printed Date: May 12, 2025 at 8:24 AM
Topic: 1998 Altima remote start add-on
Posted By: shortcircuit
Subject: 1998 Altima remote start add-on
Date Posted: October 27, 2004 at 4:41 PM
I'm installing Crimestopper RS-901 remote start add-on on my wife's 98 Altima GLE with factory alarm and keyless entry. The Altima has one radio accessory wire (WHITE/ blue) that is hot on both ACC and ON. The car also has one blower accessory wire (BLACK/ pink) that is on only when the key is in ON position (off at ACC). Do I have to isolate this BLACK/ pink wire using relay or can I just connect the Crimestopper accessory wire (gray) to both the BLACK/ pink and WHITE/ blue? Thanks.
Replies:
Posted By: Craig3708
Date Posted: October 27, 2004 at 8:15 PM
Always diode wires when you are using one feed wire , to feed two wires.........
Posted By: shortcircuit
Date Posted: October 27, 2004 at 11:46 PM
Could you elaborate more on the diode wires please. I don't get it.
Posted By: hagmanti
Date Posted: October 28, 2004 at 12:02 AM
On the left, near the top, under the heading "Basics" is a link to Diodes. This has a lot of good information about how they work and common applications for them. I'd suggest you read that, and come back if you still don't get it. (Not trying to be mean! Until I found that link, everything I did w/ diodes was rote memorization-- now I understand how and more importantly why they work.)
Me
Posted By: shortcircuit
Date Posted: October 28, 2004 at 8:47 AM
Pardon my stupidity (newbidity if that's a word, lol). I read the article on the diode. I suppose what you mean is to connect the remote start radio accessory (gray) directly to the car's accessory (WHITE/ blue) and connect that gray to anode and BLACK/ pink to cathode. Right? I understood that part. What I don't understand is BLACK/ pink is supposed to be on during ON position and off during ACC. What does the diode do in this case? I was thinking to use a relay to get the BLACK/ pink wire to be on only at ON position. I'll be using an ignition wire (on at ON and START) normally close with the BLACK/ pink. On the coil, I'll be using GND and START so that when START is commanded, BLACK/ pink will not be connected to anything (open). On the back of my mind, somehow I think this is not necessary..... Hmmm..... can somebody enlighten me please?
Posted By: hagmanti
Date Posted: October 28, 2004 at 11:55 AM
Oops. Didn't read this original post.
Do _not_ diode isolate these wires!
These are high current wires, and your RS needs to feed each separately.
I wouldn't bother hooking up the WHITE/ blue wire if you can live w/o the radio during remote starts, and can confirm nothing else important is fed by that wire. Just my $.02. If you do need to hook it up, wire two relays: gray wire on RS to pins 85, ground to 86, fused 12V constant to pins 30, and pins 87 to the BLACK/ pink and WHITE/ blue wires in your car.
Make sure that the RS pink/white wire is hooked to the BLACK/ blue (or BLACK/ white) cold start wire, and configured as a starter wire.
Me
Posted By: shortcircuit
Date Posted: October 28, 2004 at 12:02 PM
hagmanti, thanks. You're right on the WHITE/ blue (radio) wire. I don't need it during remote start. It is strictly used for radio & power antenna. I will just connect the BLACK/ pink (AC & Heater blower) to the Crimestopper Remote Start ACC (gray). I overthought this stuff way too much. Thank you.
Posted By: shortcircuit
Date Posted: October 29, 2004 at 1:10 PM
Update: I got all necessary wires connected. I found a good tach using the tach finder mode of Crimestopper. Programmed it (option #1). I programmed the RS-901 for 3 negative pulse remote start (green wire connected to Altima's door lock-). When I tried remote start by locking 3 times, nothing happened. Somehow, the RS-901 (RS-900 written on the module) doesn't recognize the 3 negative lock pulses. I verified the green wire received 3 pulses when I pressed lock button 3 times by multimeter (voltage dropped to around 10V for each press). I'm lost. Maybe it's the way I'm programming this thing since I only have the brake pedal. Anybody here familiar with Crimestopper RS-900 or 901 could kindly help me? Thanks.
Posted By: shortcircuit
Date Posted: November 05, 2004 at 9:04 AM
Final update: I solved the problem. The Nissan factory alarm & keyless doesn't toggle the unlock(-) and lock(-) wires when unlock or lock button was pressed. I found this out when I ground the RS901 remote start activation green wire three times, the car did remote start. The Altima gray lock(-) and purple unlock(-) only work using the main switch in the passenger door. So when I locked 3 times using the main switch, the car also did remote start. The solution was to use a relay and connect it to the driver door lock motor wire(+). The relay was wired to bring ground to the green RS activation wire when the driver door lock motor gets +12V.
Posted By: shortcircuit
Date Posted: November 05, 2004 at 9:04 AM
Final update: I solved the problem. The Nissan factory alarm & keyless doesn't toggle the unlock(-) and lock(-) wires when unlock or lock button was pressed. I found this out when I ground the RS901 remote start activation green wire three times, the car did remote start. The Altima gray lock(-) and purple unlock(-) only work using the main switch in the passenger door. So when I locked 3 times using the main switch, the car also did remote start. The solution was to use a relay and connect it to the driver door lock motor wire(+). The relay was wired to bring ground to the green RS activation wire when the driver door lock motor gets +12V.
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